Other Ending Letters

Word Lengths Starting With O

All 1297 Matching Words

oakenMade from the wood of the oak tree. Also in metaphorical uses, suggesting robustness.oarmanAlternative form of oarsman.oarsmanA person who rows a boat, either alone or with others.oarsmenplural of oarsmanoarspersonA rower; an oarswoman or oarsmanoarswomanA female oarsman.oaseanOf or relating to an oasis.oasificationThe process of restoring water, soil, and plant life to an environment that has been degraded by soil erosion.obambulation(obsolete) Wandering about; a casual outing.obanArchaic form of obang (“Japanese coin”).obasanA Japanese middle-aged woman.obdormitionThe sensation of numbness that occurs in a limb when it falls asleep due to pressure on a nerve.obduction(largely obsolete) An autopsy.obduration(obsolete) A hardening of the heart; hardness of heart.obeahmanA male practitioner of obeah.obelin(biochemistry) A calcium-regulated bioluminescent photoprotein from marine organisms of the genus Obelia.obelion(anatomy) A craniometric point on the sagittal suture between the parietal foramina near the lambdoid suture.oberration(obsolete) A wandering about.obesificationThe action or the result of obesifyingobesogen(pathology) A chemical or other factor that disturbs the body's normal processes, causing it to tend toward obesity.obestatin(biochemistry) An oligopeptide sequence, present in ghrelin, that binds to a specific orphan receptorobfirmation(obsolete, rare) stubbornness; obduracy.obfuscation(countable) A single instance of intentionally obscuring the meaning of something to make it more difficult to grasp.obfusticationSynonym of obfuscation.obituarianOne who writes obituaries.objectificationThe act or process of objectifying something intangible.objectionThe act of objecting.objectivationThe conversion of a concept or abstraction into an object.objectivizationThe process or result of objectivizing.objectizationobjectificationobjuration(rare) The act of objuring; a firm binding by oath.objurgation(uncommon) A strong rebuke or scolding.oblationThe offering of worship, thanks etc. to a deity.oblatration(obsolete) The act of barking at someone or something; (figuratively) the act of ranting at someone or something; an instance of these.oblectation(obsolete) The act of pleasing highly, or state of being greatly pleased; delight.obligationThe act of binding oneself by a social, legal, or moral tie to someone.obligatorification(linguistics) The act or process of, or an instance of, (something) becoming or being made (more) obligatory, especially as part of the process of grammaticalization.obligatorizationSynonym of obligatorification.oblimersenAn antisense oligodeoxyribonucleotide being studied as a possible treatment for several types of cancer.obliquationThe act of becoming oblique; a turning to one side; obliquity.obliterationThe total destruction of something.obliviationTotal removal or erasure.oblivionThe state of forgetting completely, of being oblivious, unconscious, unaware, as when sleeping, drunk, or dead.obluctation(obsolete) opposition; resistanceobmurmurationThe action or an instance of complaining or criticizing.obnubilationThe action of darkening or fact of being darkened, as with a cloud; obscuration.obreption(Scots law, obsolete) Act of obtaining gifts of escheat by fraud or surprise.obrogation(law) The act of obrogating.obruption(geology, taphonomy) Quick burial.obrution(geology) A rapid burial or smothering event.obsceniconSynonym of grawlix (“string of typographical symbols used to represent obscenity”).obscurationThe state of being obscured.obscurification(colloquial, slang, used as a nonce only) The act of making something obscure, or (in computing) obfuscating source code etc.obscurin(biochemistry) A protein in humans, related to titin and nebulin.obsecrationAn earnest supplication made in the name of GodobservationThe act of observing, and the fact of being observed (see observance)obsessionThe quality of being obsessed.obsidian(mineralogy) A type of naturally occurring black glass produced by volcanoes.obsign(obsolete) To seal; to confirm, as by a seal or stamp.obsignationThe act of sealing or ratifying.obsoletionObsolescence.obstetrication(obsolete) obstetrics or midwiferyobstetrician(medicine) A physician who specializes in childbirth.obstinationstubbornnessobstipationsevere constipation caused by intestinal obstruction.obstrictionThe state of being constrained, bound, obliged, or obligated.obstructionThe act of obstructing, or state of being obstructed.obstupefaction(obsolete) stupefactionobtain(transitive) To get hold of; to gain possession of, to procure; to acquire, in any way.obteinObsolete form of obtain.obtenebration(obsolete) The act of darkening, or darkness.obtensionobtaining; obtainmentobtention(rare, sciences, law) The act of obtaining.obtestation(archaic) The act of obtesting; supplication; protestation.obteynObsolete form of obtain.obtrectation(obsolete) Disparagement, the belittling of someone or something; slander.obtruncation(formal) The act of lopping or cutting off.obtrusionAn interference or intrusion.obtundation(medicine) Decreased level of alertness or consciousnessobturationThe act of stopping up, or closing, an opening.obtusifolin(organic chemistry) The anthraquinone derivative 2,8-dihydroxy-1-methoxy-3-methylanthracene-9,10-dione present in Senna obtusifoliaobtusin(organic chemistry) A bromine-containing polycyclic ketal found in the marine alga Laurencia obtusa.obtusion(medicine) The blunting, dulling, or weakening of normal sensation.obtustatin(biochemistry) A particular disintegrin.obumbration(archaic) The act of darkening or obscuring; obnubilation; obscuration.obvelation(formal) concealmentobvention(obsolete) The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering.obversionThe act of turning toward or downward.obviationThe act of obviating; deterrence or prevention.occaecation(obsolete) An act of going blind.occashunPronunciation spelling of occasion.occasionA favorable opportunity; a convenient or timely chance.occationMisspelling of occasion.occecationThe state of being blind.occidentalizationThe process or result of occidentalizing.occidiofunginAn actin-binding antifungal glycopeptide present in a Burkholderia bacteriumoccipitalisationConnection with the occipital boneoccipitalizationAlternative form of occipitalisation.occisionA killing; the act of killing.occludin(biochemistry) Any of a family of plasma-membrane proteins located at tight junctionsocclusionThe process of occluding, or something that occludes.occultationThe state of being occult (“hidden, undetected”).occupationThe act, process or state of possessing a place.occursion(obsolete, literal or figurative) A meeting or striking together; a clash or collision.ocean(countable) One of the large bodies of water separating the continents.ocellation(uncountable) The development of eye-like markings, such as those on the wing of a butterfly or tail of a peacock.ochratoxin(toxicology) Any of a class of mycotoxins, having an isocoumarin structure, produced by some fungi of the genus Aspergillus and othersochrobactinA siderophore produced by bacteria of the genus Ochrobactrumocinaplon(pharmacology) A particular kind of anxiolytic pyrazolopyrimidine drug.ocriplasminA recombinant protease, having activity against fibronectin and laminin, which is used in the treatment of vitreomacular adhesionoctachlorodibenzofuran(organic chemistry) The toxic perchloro derivative of dibenzofuran 1,2,3,4,6,7,8,9-octachlorodibenzofuranoctachoron(mathematics) A four-dimensional object analogous to a cube, constructed out of eight cubes.octacontagon(geometry) A polygon with 80 sides and 80 angles.octactinianAny anthozoan coral of the former subclass Octactiniaoctadecagon(geometry, rare) A polygon with 18 sides and 18 vertices.octadecahedron(geometry) A polyhedron with eighteen faces.octadehydrocorrin(organic chemistry) corroleoctaedronAlternative spelling of octahedron.octagenarianMisspelling of octogenarian.octagon(geometry, also attributively) A polygon with eight sides and eight angles.octagonianRelating to an octagonoctahedron(geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.octahydrocurcumin(organic chemistry) The metabolite of curcumin (3S,5S)-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-diol that shows anticancer activityoctairon(chemistry, in combination) Eight iron atoms or cations in a molecule (Fe₈)octakaidecahedronSynonym of octadecahedron.octakishexahedron(geometry, rare) A polyhedron with 48 faces.octamerisationAlternative form of octamerization.octamerizationoligomerization that forms an octameroctamoxinA hydrazine drug formerly used as an antidepressant.octanOccurring every eight days.octanoylationreaction with octanoic acid (to form an octanoate)octaoxygenA red allotrope of oxygen, O₈, that is stable only under very high pressuresoctaroonAlternative spelling of octoroon.octathlon(athletics) A sporting event consisting of eight different sports or contests.octavation(music) Transposition by an octave.octaviation(music) The repetition of a chord an octave higher or lower than the original.octavin(music) A single-reed instrument with a conical bore, originating in Germany.octillion(US, modern British and Australia, short scale) A thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 10²⁷.octoclothepinSynonym of clorotepine.octocorallianAny coral of the subclass Octocoralliaoctodecillion(US, modern British and Australian, short scale, rare) 10⁵⁷.octogenThe explosive HMXoctogenarianSynonym of eightysomething: a person between 80 and 89 years old.octogonObsolete form of octagon.octohedronAlternative form of octahedron.octonarian(prosody) Composed of eight metrical feetoctonianMisspelling of octonion.octonion(mathematics) An 8-dimensional nonassociative extension of a quaternion with a real part and 7 imaginary parts (each a real multiple of a distinct square root of −1).octopawnA board game played with four pawns on each side of a 4×4 board.octopeanOf, pertaining to, or resembling an octopus; octopuslike.octopianOf, pertaining to, or resembling an octopus; octopuslike.octoploidization(genetics) Modification to become octoploidoctopodanRelating to cephalopod molluscs of the order Octopoda.octopodeanResembling or pertaining to an octopus; octopuslike.octopodianResembling an octopus; octopuslike.octoroon(dated or historical) Someone having one-eighth black ancestry.octothorn(rare) Alternative form of octothorpe, the symbol #.octreoscanscintigraphy of radiolabelled octreotideoctuplicationmultiplication by eightoctylationmodification by addition of an octyl groupoculogyrationMovement of the eye about the anteroposterior axis; eye-rollingoculomotionThe faculty of movement of the eye.ocypodanAny crab of the family Ocypodidaeocypodian(zoology, archaic) A member of the crab family Ocypodidae.odalborn(historical) Inheriting land by odal.odalman(historical) A man having odal, or able to share in it by inheritance.odden(rare, ambitransitive) To make or become odd (all senses)odderon(physics) The hypothetical counterpart of the pomeron, carrying odd charge parity.oddification(mathematics) Conversion to an "odd" formoddmanAlternative form of odd man (“one who does odd jobs”).oddsmanA person who offers odds to gamblers.odeionAlternative form of odeon.odenA Japanese one pot winter dish, of varying ingredients.odeonAn ancient Greek or Roman building used for performances of music and poetry.odonatan(zoology) Any member of the Odonata (dragonflies etc.).odontopathogenA dental pathogenodontopterygianAn extinct pelican-like pelagornithid seabird of the suborder Odontopterygia.odontosection(surgery) An incision into a toothodorizationThe addition of an odorant to a gas (so that leaks can be more easily detected)odorranalectin(biochemistry) A small peptide lectin with the potential for drug delivery in cubosomesodourisationAlternative form of odorization.odourizationAlternative form of odorization.oegipanAlternative form of aegipan.oenanthotoxinA toxin found in hemlock water dropwort, Oenanthe crocata, and other plants of the genus Oenanthe.oenin(biochemistry) An anthocyanin, the 3-glucoside of malvidin and the red pigment in red wine.oesophageanAlternative form of esophagean.oesteocalcinAlternative form of osteocalcin.oestrin(biochemistry, now rare) An oestrogen, specifically oestrone.oestrogen(Commonwealth) Alternative spelling of estrogen.oestrogenisationAlternative form of estrogenization.oestruation(biology) The period of heat, or eagerness to mate, in animals.ofanAlternative form of ophan.offcumden(Yorkshire) Someone not from the area; an incomer, an outsider.offenPronunciation spelling of often.offendotron(neologism, slang, derogatory) A person who makes it their business to take offense wherever possible.offension(obsolete) Assault; attack, offensive; offense.officialisationAlternative spelling of officialization.officializationThe process or result of officializing.officiationThe act of officiating.officinalisininA particular steroid glycoside.offnPronunciation spelling of off, representing African-American Vernacular English.offscreenExisting or happening outside the frame of the cinema or television screenoffseasonAlternative form of off-season.offshorization(neologism) The act of moving capital to offshore accounts, or relocating business to a foreign country with a more lenient tax regime.offspinAlternative form of off spin.offuscationObsolete form of obfuscation.ofloxacin(pharmacology) A fluoroquinolone antibiotic C₁₈H₂₀FN₃O₄ composed of equal quantities of levofloxacin and dextrofloxacin, that is a broad-spectrum antibacterial agent that is used in topical solution for otic or ophthalmic use or is administered orally or intravenously for other uses.oftenFrequently; many times on different occasions.oganessonThe chemical element (symbol Og) with atomic number 118. It is the heaviest known element. Highly radioactive, it does not occur naturally. Originally expected to be a noble gas, it is now predicted to be a reactive metallic solid, and a semiconductor or a post-transition metal.ogganition(obsolete, rare) A snarling or grumbling.ogginAlternative spelling of ogin.ogin(UK, chiefly nautical and navy) A large body of water including the sea or the ocean.ogtiern(Scotland, historical) The person who is fourth in the line of descent from a thane.ohnAlternative form of on (“without”).ohunkakanTraditional Sioux evening stories.oilbeanAn African tree, Pentaclethra macrophylla.oilcanA container with a long spout, for holding oil and delivering it in drops or small quantities for lubrication.oildown(car racing) An oil spill sufficiently serious as to require the use of mechanical equipment to clean it up.oilmanSomebody involved in the production, refinement or delivery of oil; such as an oil field worker or executive, or the owner of an oil well.oilmenplural of oilmanoilpanAlternative form of oil pan.oilskinCloth made from cotton and treated with oil and pigment to make it waterproof.oilwomanA female oilman; a woman involved in oil production or delivery.oiranA high-status courtesan in Japan.okamisan(sumo) The wife of a stablemaster who oversees all activities except coachingokinaxobin(biochemistry) A type of thrombin present in the venom of Ovophis okinavensisolachenAlternative form of eulachon.olation(inorganic chemistry) The process by which metal ions form polymeric oxides in aqueous solution.oldenFrom or relating to a previous era.oldman(now nonstandard) Alternative form of old man.oldmenplural of oldmanoldtown(nonstandard, very rare) Alternative form of old town.oleacein(organic chemistry) The phenolic ester 2-(3,4-dihydroxyphenyl)ethyl (Z)-4-formyl-3-(2-oxoethyl)hex-4-enoate present in olive oiloleagenin(organic chemistry) The aglycone of various oleasides.oleamen(medicine, obsolete) A soft ointment prepared from oil.oleandomycin(pharmacology) A macrolide antibiotic produced by Streptomyces antibioticus.oleandrigenin(organic chemistry) One of several glycosides found in the leaves of the oleander plant.oleandrin(chemistry) One of several glycosides found in the leaves of the oleander plant.olecranian(anatomy) Of or relating to the olecranon.olecranon(anatomy) The bony process at the top of the ulna forming the point of the elbow.olecrononMisspelling of olecranon.olefin(organic chemistry) Any of a class of unsaturated open-chain hydrocarbons such as ethylene; an alkene with only one carbon-carbon double bond.olefination(organic chemistry) Any reaction that yields an olefinoleiferinAny of a group of antifungal lignans present in Virola oleiferaoleinAny naturally-occurring greasy or oily substance related to fat.oleonAlternative form of oleone.oleoresinA homogeneous mix of essential oil and resin.oleosinA kind of structural protein found in vascular plant oil bodies and in plant cells.oleovitaminA vitamin administered in the form of an edible oil.oleuropein(organic chemistry) A complex glycoside, found in the leaves of olive and privet, that may have a beneficial effect on the immune system.olfactionThe sense of smell; the detection of airborne molecules.olfactomedin(biochemistry) Any of a class of polymeric glycoproteins that are a major component of the extracellular matrix of olfactory neuroepitheliumolflactomedinMisspelling of olfactomedin.oligarchization(politics, uncountable) Conversion of a political system to an oligarchy; (countable) an instance of this.oligoadenylation(biochemistry) The formation of an oligoadenylateoligoanovulationInfrequent or irregular anovulationoligocellodextrinAny cellodextrin that contains several glucose unitsoligodendroglion(anatomy) A glial cell smaller than an astrocyte, that forms the myelin sheath for many axonsoligodextrin(biochemistry) An oligomeric form of dextrinoligodimerization(organic chemistry) The formation of oligodimersoligofectaminAlternative form of oligofectamine.oligofractionAnything composed of several fractions (in any of several contexts)oligofractionationdivision into oligofractionsoligofructan(biochemistry) Any oligosaccharide composed of fructose residues.oligoglucan(biochemistry) An oligomer of glucoseoligoglycan(biochemistry) An oligomeric form of glycanoligohydramnionAlternative form of oligohydramnios.oligohymenophoreanAny ciliate of the class Oligohymenophoreaoligolignan(biochemistry) Any oligomer composed of lignan monomersoligomannan(biochemistry) An oligomeric form of mannanoligomerationSynonym of oligomerization.oligomerisationAlternative spelling of oligomerization.oligomerization(chemistry) The formation of an oligomer from a monomeroligomycinAny of a group of toxic macrolides, produced by Streptomyces bacteria, that are used as antibioticsoligoovulationInfrequent or irregular ovulationoligopectinAn oligomeric form of pectinoligophrenin(biochemistry) Any of a family of proteins that modulate cytoskeletal changesoligoprogressionThe formation of several metastatic lesions from an initial tumouroligoprotection(biology) The protection of oligodendrocytes from damageoligotrophicationModification of an environment to make it oligotrophicoligotrophizationThe process of becoming oligotrophicoligoubiquitin(biochemistry) A small number of linked ubiquitin molecules, especially when formed by oligoubiquitinationoligoubiquitination(biochemistry) Repeated ubiquitination to add a small number of ubiquitin moleculesoligoubiquitylationoligoubiquitinationoligouridylationThe addition of several uridine nucleotides to RNAoligoviologen(organic chemistry) Any compound composed of several viologen moietiesoligoxyloglucan(biochemistry) An oligomeric form of xyloglucanolitorinA particular steroid glycoside.olitoriusinA particular steroid glycoside.olivegreenAlternative spelling of olive green.olivin(organic chemistry) A complex bitter gum found on the leaves of the olive tree.olivomycin(pharmacology) Any of a class of glycosidic antibiotics obtained from Actinomyces olivoreticuli.olmesartan(pharmacology) An angiotensin-receptor antagonist used to treat hypertension.omadhaun(Ireland) A fool, someone who is out of their senses, simpleton.ombudsmanAn appointed official whose duty is to investigate complaints, generally on behalf of individuals such as consumers or taxpayers, against institutions such as companies and government departments.ombudsmenplural of ombudsmanombudsperson(gender-neutral) Synonym of ombudsman.ombudswomanA female ombudsman.omegatronA kind of mass spectrometer using the principles of cyclotron acceleration.omenA thing of prophetic significance.omentin(biochemistry) Any of a family of secretory proteins expressed predominantly in visceral adipose tissue.omentoplication(surgery) plication of the omentumomicron(virology, pathology) Ellipsis of Omicron variant.omikronAlternative form of omicron.omination(obsolete) presage; omen.omission(uncountable) The act of omitting.ommatinA simple ommochromeomminA type of ommatin that contains sulfurommissionMisspelling of omission.omniapan(fandom slang) A theoretical member of all amateur press associations.omnibusman(archaic) A person employed to drive a bus.omnicronMisspelling of omicron.omnisovereign(rare) Absolutely sovereign.omnitruncation(geometry) An operation applied to a regular polytope in a Wythoff construction that creates a maximum number of facets.omohyoideanRelating to the omohyoid.omophorionA band of brocade originally of wool decorated with crosses and worn on the neck and around the shoulders as the distinguishing vestment of a bishop and the symbol of his spiritual and ecclesiastical authority in the Eastern Christian liturgical tradition, equivalent to the Western archepiscopal pallium.onIn the state of being active, functioning or operating.oncodomainA protein domain responsible for a canceroncogenAny agent that causes tumors.oncoinflammation(pathology) inflammation associated with a canceroncomodulationThe modification of the course of a cancer.oncomodulin(biochemistry) A calcium-binding parvalbumin found in macrophagesoncomutationA mutation associated with a canceroncopathogenAny oncogenic pathogenoncoprotein(genetics, oncology, biochemistry) A protein that is coded for by an oncogene.oncostainA substance that stains cancerous tissue (in microscopic examination)oncostatin(medicine) Any of a group of pleitropic cytokines.oncostationMisspelling of oncostatin.oncostman(mining, historical) Any workman who was paid a daily rate.oncosuppressionThe suppression of the formation and development of tumoursoncovin(medicine) vincristineondansetron(pharmacology) A carbazole derivative (trademark Zofran), C₁₈H₁₉N₃O, that is a serotonin receptor antagonist administered by injection and by mouth to relieve nausea and vomiting, especially during cancer therapy.oneirogenAny drug, herb, etc. that produces or enhances a dream-like state of consciousness.oneration(obsolete) The act of loading or burdening.onionA monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice.onionskinA thin, strong, light, translucent paper; used especially for making carbon copies.oniscidean(zoology) Any of the terrestrial isopod crustaceans of suborder Oniscidea; a woodlouse.onjisaponinAny of a group of saponins, from the root of Polygala tenuifolia, used in Chinese medicineonloanA loan that is made from something that was borrowed; something that is onloaned.onlybornBorn as the only child in a family, flock, or the like.onocerin(organic chemistry) A white crystalline waxy substance extracted from the root of the leguminous plant spiny restharrow (Ononis spinosa).onomasticianA person who studies onomastics; one who studies or researches names.onomasticonA book, list, or vocabulary of names, especially of people.onomatopoeian(obsolete) A word formed by onomatopoeia.ononin(biochemistry) An isoflavone, the 7-O-glucoside of formononetin, found in various plants and herbs, including the soybean.onscreenAs seen on a screen (as of television, film, or computer) rather than in real life.onsenA (Japanese) hot spring.ontotheologianOne who studies ontotheology.onychophoran(zoology) Any of many wormlike carnivorous ecdysozoan animals of the phylum Onychophora.onychopsinAny of a group of opsins present in velvet worms of the phylum Onychophoraonygenalean(mycology) Of or pertaining to the fungal order Onygenales.onymizationSynonym of proprialization.onyonObsolete spelling of onion.oocyan(archaic) biliverdinoolachanAlternative form of eulachon.oolakanAlternative form of eulachon.oolicanAlternative form of eulachon.oolichanAlternative form of eulachon.oophoron(medicine) Synonym of ovary.oorhodein(archaic) A reddish-brown pigment found in eggshells.oosorption(biology) The resorption of a developing egg typically as a response to a parasiteoosporein(organic chemistry) A dibenzoquinone that is a toxic metabolite of the fungus Cochliobolus kusanoiootaxon(taxonomy) Any taxonomic classification of egg fossilsopacificationThe action of making something opaque or cloudy.opalisationAlternative form of opalization.opalizationThe process of making something opalescent, or of converting wood etc into opal.opaquen(ambitransitive, rare) To make or become opaque.open(usually not comparable) Physically unobstructed, uncovered, etc.operafication(rare) The act or process of operafying.operation(uncountable) The method by which a device performs its function.operationalisationAlternative spelling of operationalization.operationalizationThe act or process of operationalizing.opercularisationAlternative form of opercularization.opercularizationThe formation and development of the operculumoperculationThe condition of being operculateoperonA unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.operonization(genetics) The formation of operons in a genomeophanA member of an order of wheel-like angels.ophaninA toxin present in the venom of the king cobra Ophiophagus hannahophidianAny species of the suborder Serpentes; a snake or serpent.ophiobolinAny of a class of phytotoxic metabolites produced by certain fungi of the genus HelminthosporiumophioleucinAny brittle star of the subfamily Ophioleucinaeophiopogon(botany) Any evergreen plant of the genus OphiopogonophiopogoninA particular steroid glycoside.ophiopojaponinA particular steroid glycoside.ophiostomataleanRelating to fungi of the order Ophiostomatalesophiotoxin(obsolete) Any toxin present in a snake venom.ophiuran(zoology, dated) Of or relating to the Ophiuroidea.ophiuroideanAny brittle star of the class Ophiuroideaophryon(anatomy) The point in the brow just above the optic foramen, or eyesocket, and glabella.opinationThe state or process of opining.opinionThe judgment or sentiment which the mind forms of persons or things; estimation.opinionationThe quality of being opinionated.opiomelanocortin(biochemistry) A polypeptide, found in the pituitary gland, associated with endorphins and other hormonesopiorphin(biochemistry) A painkilling chemical compound first isolated from human saliva.opisthion(anatomy) The middle of the posterior margin of the foramen magnum of the skull.opisthocoelianopisthocoelousopisthocranion(anatomy) The posteriormost point in the midsagittal plane of the occiputopisthodontianAny moth of the genus Opisthodontiaopistoporin(biochemistry) Any of a group of peptides that form pores in cell membranesopitulation(obsolete) The act of helping or aiding; assistance.oppidan(also Oppidan) A class of student in traditional English public schools such as Eton; opposed to colleger or King's Scholar.oppignerationAlternative form of oppignoration.oppignoration(obsolete) The act of pawning or laying in pledge.oppilationa stopping by redundant matter, i.e. an obstruction, particularly in the lower intestines.oppletion(obsolete) The act of filling up.oppositionThe action of opposing or of being in conflict.oppressionThe exercise of authority or power in a burdensome, cruel, or unjust manner.opprobriation(rare, literary) Scornful reproach or disapproval; opprobrium.oppugn(transitive, rare) To contradict or controvert; to oppose; to challenge or question the truth or validity of a given statement.oprationMisspelling of operation.oprelvekinrecombinant interleukin 11, a thrombopoietic growth factor that directly stimulates the proliferation of hematopoietic stem cells and megakaryocyte progenitor cells and induces megakaryocyte maturation resulting in increased platelet productionopsin(biochemistry) Any of a group of light-sensitive proteins in the retina.opsinizationMisspelling of opsonization.opsonIn Ancient Greek cuisine, delicacies such as cooked fish, considered an integral component of a meal.opsonificationSynonym of opsonization.opsoninAny chemical produced by the body, including antibodies and complement proteins, that causes a pathogen to be more susceptible to phagocytosis.opsonisation(British spelling, immunology) Alternative spelling of opsonization.opsonization(immunology) The process or result of opsonizingoptation(obsolete) A wish; a desire.opticalman(US, military, historical) A member of the navy who specialized in the use of optical tools.opticianA person who makes, dispenses or sells lenses, spectacles.optimalisationAlternative form of optimalization.optimalizationAlternative form of optimization.optimationoptimization.optimedin(biochemistry) A particular olfactomedinoptimisationAlternative spelling of optimization.optimizationThe design and operation of a system or process to make it as good as possible in some defined sense.optineurin(biochemistry) A protein that is associated with glaucomaoptionOne of a set of choices that can be made.optionalizationThe process of making something optional.optoejectionoptical ejectionoptoinjectionoptical injection, photoinjection (of nucleic acids)optoisolationisolation of part of an electrical circuit by means of an optoisolatoroptoporationSynonym of photoporation.optostimulationoptical stimulationoraisonObsolete form of orison.oralisation(chiefly UK) The act or an act of oralising; the act or an act of turning something written into something oral.oralization(chiefly US) The act or an act of oralizing; the act or an act of turning something written into something oral.orangoutanRare form of orangutan.orangutanAn arboreal ape, characterised by their shaggy reddish-brown coat and long arms, which comprise the genus Pongo, native to Borneo and Sumatra.orarian(archaic) Of or pertaining to a coast.orarionA deacon's stole in the Eastern Orthodox Church.orationA formal, often ceremonial speech.oratorianA member of a Roman Catholic oratory.orbation(obsolete) The state of being orbate, or deprived of parents or children; privation, in general; bereavement.orbicularian(zoology) Any spider of the clade Orbiculariae.orbiculationThe state or quality of being orbiculate.orbifloxacin(pharmacology) A fluoroquinolone antibiotic.orbiton(particle physics) A quasiparticle, corresponding to the orbital energy of an electron, which can result from an electron apparently ‘splitting’ under certain conditions.orbofiban(pharmacology) An orally active platelet receptor antagonist.orcein(chemistry) a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouringorchardmanA man who owns or tends an orchard.orchestration(uncountable, music) The arrangement of music for performance by an orchestra.orchestrion(music) A mechanical multiple musical instrument designed to sound like an orchestra or band.orchidean(botany) orchidaceousorcin(organic chemistry) The organic compound 3,5-dihydroxytoluene, found in many lichens and synthesizable from toluene.orcokininAny of a family of crustacean peptides that elicit potent myotropic effects in gut tissuesordainTo prearrange unalterably.ordalian(law, obsolete) Of or relating to trial by ordeal.ordinationThe act of ordaining or the state of being ordained.ordnanceman(military) A person responsible for storing, maintaining, and handling ordnance.orellanin(organic chemistry) orellanineoreoselin(organic chemistry) A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant, Oreoselinum majus (formerly Imperatoria oreoselinum), and yields resorcin on decomposition.orexigenAny orexigenic substanceorexin(biochemistry) Either of two neuropeptide hormones found in vertebrates; the hypocretins.orfen(UK, dated) Pronunciation spelling of often, representing British English.organThe larger part of an organism, composed of tissues that perform similar functions.organificationThe stabilization of a material within an organ.organisationNon-Oxford British English and Australian standard spelling of organization.organization(uncountable) The quality of being organized.organoboron(organic chemistry) Describing any organic compound containing a carbon to boron bondorganocarbon(organic chemistry) Describing any organic compound containing a carbon to carbon bond.organocation(organic chemistry) Any cation formed from an organic compoundorganochalcogen(organic chemistry) The class of such compounds.organodifferentiation(biology) The differentiation of organs in a developing plant or animalorganogen(chemistry, dated) Any of certain other elements sometimes found in organic compounds, such as sulphur and phosphorus.organohalogen(organic chemistry) Describing an organic compound containing one or more halogen atoms.organohydrogen(organic chemistry) Describing any organic compound containing a carbon to hydrogen bond.organoiron(organic chemistry) Describing any organic compound containing a carbon to iron bond.organomineralization(geology) The mineralization of organic (biological) materialorganonA set of principles that are used in science or philosophy.organonitrogen(organic chemistry) Describing any compound in which an organic group is directly linked to a nitrogen atomorganooxygen(organic chemistry) Describing any organic compound containing a carbon to oxygen bond.organopolymerization(organic chemistry) The polymerization of organic compounds, especially when catalysed by another organic compound.organoprotectionprotection from the action of organic compounds, especially from organic free radicalsorganosiliconAny compound of this kind.organotin(organic chemistry) Describing any organic compound containing a carbon to tin bondorganotungsten(organic chemistry) Describing any organic compound containing a carbon to tungsten bond.organoxenon(organic chemistry) Describing any organic compound containing a carbon to xenon bond.orgasmatron(science fiction) A hypothetical device capable of inducing orgasm.oridoninA medically useful diterpenoid found in Rabdosia rubescens.orientalizationAlternative letter-case form of Orientalization.orientation(countable) The determination of the relative position of something or someone.orientin(organic chemistry) A flavone that is a glucoside of luteolin.origanAlternative form of oregano (“wild marjoram, Origanum vulgare”).originThe beginning of something.origination(uncountable) The process of bringing something into existence.orihonA book in the form of a long strip of paper with writing on one side, folded in zigzag fashion, historically associated with Japan and China.orillionAlternative form of orillon.orillonA semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, found in old fortresses.oritavancinA glycopeptide antibiotic being developed for the treatment of serious Gram-positive infections.orizonObsolete spelling of orison.orn(transitive, obsolete) To ornament; to adorn.ornamentationDecoration, adornment or embellishment.ornibactin(biochemistry) A siderophore produced by the helicobacter Burkholderia cenocepaciaornipressinA vasoconstrictor, haemostatic and renal agent.ornithischianAny of the order Ornithischia of typically herbivorous dinosaurs that have a pelvic structure similar to that of birds.ornithodiranAny birdlike reptile of the clade Ornithodira.ornithomimosaurianAny theropod dinosaur of the clade OrnithomimosauriaornithonAn aviary; a poultry house.ornithopodanSynonym of ornithopod (“dinosaur of the clade Ornithopoda”).ornithoscelidan(zoology, now historical) Any of the Dinosauria, formerly known as Ornithoscelida.ornithsichianMisspelling of ornithischian.ornithuranSynonym of ornithurine.orogen(geology) Rock deformed by orogeny; a belt of such rock(s).oroidin(organic chemistry) Any of a family of alkaloids derived from marine spongesoromediterraneanRelating to mountainous parts of the Mediterranean regionorosensationA false sensation of taste obtained by stimulation of the tongue.oroxylin(organic chemistry) Any of a group of methylated flavones present in plants of the genus OroxylumorphanA person, especially a minor, both or (rarely) one of whose parents have died.orphaninSynonym of nociceptin.orpharion(music) A musical instrument of the Renaissance, part of the cittern family, whose metal strings are tuned like a lute's and plucked with the fingers.orpheoreonAlternative form of orpharion.orpherionAlternative form of orpharion.orphon(genetics) A gene located outside the main chromosomal locus.orpinAlternative form of orpine (“the plant or the pigment”).orthaganAny pyralid moth of the genus Orthaga.orthianDenoting a type of singing at a very high pitch.orthiconAn early TV camera tube. (Abbreviation of orthoconoscope).orthocclusion(dentistry, orthodontics) Normal occlusion.orthocomplementation(mathematics) An involution on a complemented lattice which is order-reversing and maps each element to a complement.orthocousinAny of two or more cousins who are the children of siblings of identical gender, i.e. children of brothers or of sisters.orthodentin(dentistry) A form of dentin, composed of straight tubes, in the teeth of mammals.orthodoxianOf or pertaining to Orthodox beliefs.orthodoxizationThe process of making orthodox.orthoevolution(evolutionary theory, historical) orthogenesisorthoexciton(physics) An exciton whose spin is parallel to that of its holeorthogon(geometry) A right-angled triangle.orthogonalisationAlternative spelling of orthogonalization.orthogonalization(mathematics) The process of converting a set of functions or vectors into orthogonal ones.orthohedron(mathematics) A figure, somewhat like a cube but with two square faces and four rectangular facesorthohydrogen(physics) form of the hydrogen molecule (H₂) in which the two nuclei have parallel spin; about 75% of natural hydrogenorthologization(genetics) The process of rendering something orthologous.orthonormalisationAlternative spelling of orthonormalization.orthonormalization(mathematics) A form of orthogonalization in which the resulting vectors are all unit vectorsorthopediatricianA doctor who specializes in orthopedicsorthopteran(entomology) Any of many insects of the order Orthoptera.orthopteronAlternative form of orthopteran.orthorectificationThe processing of an aerial photograph by orthorectifying it.orthorrhaphanAny fly of the infraorder Orthorrhaphaorthoselection(evolutionary theory, historical) The hypothesis that posits that orthogenesis works by means of natural selection.orthosiphonAny herbaceous shrub of the genus Orthosiphon.orthosomycin(organic chemistry) Any of a group of antibiotics that have orthoester linkages with a carbohydrate.orthosporin(organic chemistry) The isochromenone 6,8-dihydroxy-3-[(2S)-2-hydroxypropyl]isochromen-1-one present in some fungiorthosubstitution(organic chemistry) Any substitution reaction that introduces an atom or group into the ortho- positionorthosurgeon(medicine, rare) An orthopedist or orthopedic surgeon.orthotaxon(taxonomy) A true taxon that is based on biological relationships rather than on form.orthotetrahedronA tetrahedron with three pairs of faces at right angles to one another.orthotransplantation(surgery) orthotopic transplantationortolanA small European migratory bunting (Emberiza hortulana), once eaten whole as a delicacy.ortsteinA hardpan, typically in a podzolortygan(obsolete) Any of various buttonquails.orvietan(historical) A medicinal preparation made from herbs, wine and honey, thought to be an antidote for any poison.orysastrobinA particular fungicide.oryzacystatinA cysteine proteinase inhibitor of rice.oryzalexin(organic chemistry) Any of a particular class of diterpene phytoalexins, typically obtained from rice leavesoryzalinA selective herbicide used to control annual grasses etc. in food cropsoryzastrobinA particular strobilurin fungicide.oryzeinMisspelling of oryzenin.oryzenin(biochemistry) A glutelin that is the main protein in riceoryzin(biochemistry) A predominant extracellular alkaline endopeptidase of the mold Aspergillus oryzae.osajinA flavonoid pigment found in the horseapple.oscillationthe act of oscillating or the state of being oscillatedoscillaton(mathematics) A spherically-symmetric solution to an Einstein–Klein–Gordon equationoscillaxanthin(organic chemistry) A particular carotenoid.oscillon(physics) A form of soliton observed in a granular environment.oscitation(also figurative) The act of yawning or gaping.osculationThe action of kissing.osladinA particular steroid glycoside.oslerianMisspelling of Oslerian.osmian(mineralogy) Containing osmium.osmicationThe process of osmicating.osmification(cytology) staining or fixating with osmic acid solutionosmoadaptationadaptation to changes in osmotic pressureosmoadaptionAlternative form of osmoadaptation.osmoconformationThe condition of being a osmoconformerosmoprotection(biology) The mechanism by which the cells of an organism protect themselves against osmotic stress.osmoreceptionThe action of an osmoreceptorosmoregulationThe homeostatic regulation of osmotic pressure in the body in order to maintain a certain water content (concentration of electrolytes, pH, etc).osmosensation(nematology, neurology) The sensory perception of osmotic pressureosmotin(biochemistry) An antifungal protein that provides protection from osmotic stressosmotransductionosmotic transductionosmylation(chemistry) The process of osmylating.ossamycinA particular cytotoxic agent.ossean(obsolete) A fish with a bony skeleton.ossein(biochemistry) The collagen component of boneosseodensificationThe densification of bone as part of dental implant insertionosseoinductionMisspelling of osteoinduction.osseointegrationThe direct structural and functional connection between living bone and the surface of a load-bearing artificial implant (typically a prosthetic limb), typically made of titaniumossificationThe normal process by which bone is formed.ostariophysanAlternative form of ostariophysian.ostariophysian(zoology) A member of the fish superorder Ostariophysi.osteichthianMisspelling of osteichthyan.osteichthyanA bony fish of the class Osteichthyes.osteinAlternative form of ossein.ostension(philosophy) The act of presenting an ostensive definition.ostentationAmbitious display; vain show; display intended to excite admiration or applause.osteoactivin(biochemistry) A glycoprotein that regulates osteoblast differentiation and functionosteoadherinSynonym of osteomodulin.osteocalcificationOssification and calcification.osteocalcin(organic chemistry, biochemistry) A protein, found in bone and dentin and manufactured by osteoblasts, that plays a role in mineralization and calcium ion homeostasis.osteoclacinMisspelling of osteocalcin.osteoconduction(medicine) Physical, three-dimensional scaffold or matrix to facilitate bone repair.osteocrin(biochemistry) A peptide that contributes to osteogenesis and chondrogenesis in some fishosteodegenerationThe degeneration of bone tissueosteodepositionThe deposition of bone tissue (in an inappropriate place)osteodifferentiation(biology) The differentiation of mesenchymal stem cells into bone tissueosteodistraction(surgery) The surgical correction of skeletal deformities by the lengthening of bonesosteofixationThe fixation of broken bones by means of metal plates and screwsosteoformationThe process of bone formation.osteogen(physiology) The soft tissue, or substance, which, in developing bone, ultimately undergoes ossification.osteogenin(biochemistry) A bone morphogenic protein that inhibits proliferation and stimulates differentiation of osteoprogenitors in human bone marrowosteoglossinAny fish of the genus Osteoglossum.osteoglycin(biochemistry) A proteoglycan that has osteoinductive activityosteoinduction(medicine) A biologic response in which chemical signals induce osteogenesisosteoinhibitionThe inhibition of bone tumoursosteointegrationAlternative form of osseointegration.osteomodulinA certain human gene.osteon(anatomy) Any of the central canals, and surrounding bony layers, found in compact bone.osteonectin(biochemistry) A protein that binds to hydroxyapatite to facilitate the mineralisation of collagen in bones.osteoponinMisspelling of osteopontin.osteopontin(biochemistry) A sialopontin found in bone tissueosteopontininMisspelling of osteopontin.osteoproductionformation of boneosteoproliferationProliferation or growth of bone tissueosteoprotectionThe protection of bone from physical damageosteoprotegerin(biochemistry) A cytokine that can inhibit the production of osteoclasts.osteoprotegrinMisspelling of osteoprotegerin.osteoprotogerinMisspelling of osteoprotegerin.osteoregenerationThe regeneration of bone tissueosteostatin(biochemistry) A protein fragment that modulates osteogenesisosteostimulationThe stimulation of the growth of bone tissue, typically after a fractureosteostracanAny extinct fish of the class Osteostraciosteotoxin(toxicology) An osteotoxic substance.ostikan(historical) Any of the Arab governors of Armenia.ostracean(zoology, archaic) Any bivalve of the family Ostreidae; an oyster.ostracisationAlternative form of ostracization.ostracitoxin(organic chemistry) A toxin produced by the boxfish.ostracizationThe state of being ostracized.ostraconA piece of pottery or stone, usually broken off from a vase or other earthenware vessel, especially one used to cast a vote during the Ancient Greek process of ostracism.ostrakonAlternative form of ostracon.ostreaceanAny bivalve mollusc of the Ostreaceaostreolysin(biochemistry) A cytolytic protein present in the oyster mushroom Pleurotus ostreatusostricizationMisspelling of ostracization.ostruthin(organic chemistry) An organic compound found in the masterwort (Imperatoria ostruthium).osturducken(cooking) An ostrich stuffed with a turducken; that is, a boned chicken stuffed with some sort of breadcrumb or sausage stuffing, inside a boned duck, inside a boned turkey, inside a boned ostrich.otacousticon(now rare) An instrument to aid hearing, such as an ear trumpet or hearing aid.otakukin(dated, Internet, sometimes capitalized) A person who claims or believes that their soul is a reincarnation or parallel incarnation of a fictional character (especially, from anime, manga, or video games).otamanAlternative form of ataman.otherisationAlternative form of otherization.otherizationThe process of otherizing.otherkinA person who believes their soul, essence, or identity is non-human.otherwhen(rare) Other time (sometime else).otkonA demon or spirit, in certain Native American cultures.otoancorin(biochemistry) A glycoprotein of the acellular gel of the inner earotocadherinA particular cadherin, cadherin 23, found in the cochlea and other tissues.otocephalanRelating to fish of the clade Otocephala.otoconin(biochemistry) Any of a group of matrix proteins present in otoconiaotoferlin(biochemistry) A transmembrane protein which is defective in a recessive form of human deafnessotogelin(biochemistry) A glycoprotein of the acellular gel of the inner earotolin(biochemistry) A protein found in the inner ear of vertebrates.otopathogenAny material that causes an otopathy or otitisotopetrin(biochemistry) Any of a group of transmembrane proteins associated with otoconia and with sensing the sour tasteotophysan(zoology) Any of the fish of the Otophysi series within the Ostariophysi superorder, also known as the Otophysa in some classifications.otophysianAlternative form of otophysan.otoprotectionprotection against ototoxicityotospiralin(biochemistry) A protein produced by fibrocytes of the inner earotosteon(zoology, anatomy, medicine) Synonym of otolith.otosurgeon(surgery) A surgeon whose speciality is otosurgeryototoxinAny ototoxic agent.otterskinThe pelt of an otter.ottoman(furniture) An upholstered sofa, without arms or a back, sometimes with a compartment for storing linen etc.otubain(biochemistry) Any of a family of proteases associated with ovarian tumoursouabageninThe aglycone of ouabain.ouabainA poisonous cardiac glycoside, g-strophanthin, found in the seeds of certain lianas.oulachanAlternative form of eulachon.oulachonAlternative form of eulachon.oulakanAlternative form of eulachon.ouphen(obsolete) elfish or devilishouranianAlternative letter-case form of Ouranian.outbargain(transitive) To outdo in bargaining.outblown(obsolete, poetic) Inflated with wind.outbornMoved, carried, or expressed outwardly.outbrain(transitive, informal) To exceed in mental ability; to be cleverer than.outbrazen(transitive) To bear down with a brazen face.outburn(intransitive) To burn away; be consumed by fire.outcampaign(transitive) To campaign better than (as for a political position).outcompetitionThe act of outcompeting, or outdoing a rival.outcon(transitive) To outdo in confidence trickery.outdentationSynonym of dedentation (“reversal of indentation”).outdesign(transitive) To surpass in design; to design better than.outdinTo din more loudly than, make a louder noise than (someone or something).outdoorsmanA man who spends time in outdoor pursuits or sports.outdoorswomanA woman who spends time in outdoor pursuits or sports.outearn(transitive) To make more money than, to earn more than.outen(transitive, chiefly dialectal) To put out; extinguish.outfawn(transitive, rare) To exceed in fawning.outfieldsman(cricket) A player in the outfield.outflownpast participle of outflyoutformation(neologism) Something that is sent out or broadcast from the source that formed it.outfrown(transitive) To exceed in frowning.outgain(transitive) To outperform on a quantitative measurement.outgreen(transitive) To surpass in environmental activism or consciousness, to be more conscientious than someone else about not harming the environment, be more green than another.outgrin(transitive) To surpass in grinning.outgrownpast participle of outgrowoutgun(transitive) To defeat in terms of firepower.outhasten(transitive) To be faster than.outken(transitive, nonce word) To surpass or exceed in knowledge.outkitchenAn outbuilding used as a kitchen.outlean(intransitive, poetic) To lean outward.outlearn(transitive) To surpass (someone) in learning.outlighten(transitive, poetic) To be more light or bright than; outshine.outlimn(transitive) To sketch out or delineate.outman(transitive, stative) To have more people than (one's competitor); to outnumber in men.outmigrationSynonym of emigration.outparagon(transitive, poetic, archaic) To surpass as a paragon; to show more excellence than.outpassion(transitive, rare) To be more passionate than; to surpass in passion.outplan(transitive) To surpass in planning.outpoison(transitive) To surpass in poisoning.outportionAn outer portion.outpositionTo obtain a better position than.outpreen(transitive) To surpass in preening.outquestion(transitive) To surpass in questioning.outransimple past of outrunoutreason(transitive) To surpass in reasoning; to reason better than.outreckon(transitive) To surpass in reckoning or computation.outredden(transitive, poetic) To surpass in redness.outreign(transitive) To surpass in reigning; to reign through the whole of, or longer than.outriddenpast participle of outrideoutroduction(rare) The closing remarks made at the end of a book, story, performance, etc.outrotationAn outward rotation (typically of a joint)outrun(transitive) To run faster than.outscorn(transitive) To overcome or overwhelm by haughty disregard; defy; scorn or despise.outsin(transitive) To surpass in sinning.outskinAn outer skin; surface.outspan(South Africa, transitive) To release oxen from a harness.outspin(transitive) To spin out; finish; exhaust.outspokenSpeaking, or spoken, freely, openly, or boldly; vocal; frank.outstationA station or post in a remote position; an outpost.outstrain(transitive) To outdo by straining.outsweeten(transitive) To surpass in sweetness.outtakenpast participle of outtakeoutthreaten(transitive) To threaten more than; to surpass in threats.outtrain(transitive) To train more than.outturnAn amount produced during a specified period; output or turnoutoutvillain(transitive) To exceed in villainy.outwin(obsolete) To win a way out (of); to escape (from).outwornpast participle of outwearovalbumenAlternative form of ovalbumin.ovalbumin(biochemistry) A glycoprotein which is the primary constituent of egg white.ovalentarianAny fish of the clade Ovalentaria, in the clade Percomorpha.ovalisationAlternative form of ovalization.ovalizationThe process of ovalizing; the process of changing to an oval shape.ovarian(medicine) Relating to the ovaries.ovariectomizationThe process, or the result of ovariectomizingovastacin(biochemistry) An astacin found in oocytes, involved in the hardening of the zona pellucidaovation(Ancient Rome) A victory ceremony of less importance than a triumph.ovatoxinAny of a group of toxins, related to the palytoxins, produced by the dinoflagellate Ostreopsis ovata.ovenA chamber used for baking or heating.overabduction(medicine) Hyperabduction.overabsorptionExcessive absorption.overaccelerationExcessive acceleration.overaccentuationExcessive accentuation.overaccommodation(sociolinguistics) excessive convergence; the situation where a speaker is overaccommodativeoveraccumulationaccumulation of too muchoveracidificationSynonym of hyperacidification.overactionExcessive action (as of a muscle of the body).overactivationAn excessive activationoveradaptationExcessive adaptation.overaddictionExcessive addiction.overadduction(medicine) Hyperadduction.overadministrationExcessive administration (of a drug)overadorationExcessive adoration.overadorn(transitive) To adorn excessively.overaerationExcessive aeration.overaggravationExcessive aggravation.overaggregationExcessive aggregationoveraggressionexcessive aggression; overaggressivenessoveralign(computing) To organise data with alignment greater that a compiler can handleoveralkylation(organic chemistry) Excessive alkylationoverallocationExcess allocationoverambitionThe quality of being overambitious.overamplification(chiefly music) Excessive amplification.overannotation(genetics) Excessive annotationoveranticoagulationAn excess of anticoagulationoverapplicationThe act of overapplying.overapproximationAn approximation that is higher than the true value.overarticulationexcessive articulationoverassertionExcessively forceful assertion.overattentionexcessive attention paid to somethingoverattributionExcessive attribution.overbarrenExcessively barren.overbiddenpast participle of overbideoverblacken(transitive) To blacken excessively.overblownOf exaggerated importance; too heavily emphasized, hyped, etc.overbroaden(transitive) To make too broad.overbrown(cooking, transitive) To brown too much.overburden(transitive) To overload or overtax.overbureaucratization(politics) Excessive bureaucratization.overburn(transitive) To burn too much or for too long.overburthenArchaic form of overburden.overcalcificationExcessive calcification.overcalculationCalculation producing too large a result.overcalibrationExcessive calibrationovercancellationThe act of overcancelling.overcapitalisationAlternative form of overcapitalization.overcapitalizationThe state of being overcapitalized.overcategorizationThe act, process, or result of overcategorizing.overcautionexcessive cautionovercentralisationAlternative form of overcentralization.overcentralizationExcessive centralization.overcertificationThe act or result of overcertifying.overchlorinationExcessive chlorination (usually, of swimming pool water or drinking water).overcirculationExcessive circulationovercitationExcessive citation.overcivilizationExcessive civilization; the quality of being overcivilized.overclassificationExcessive classification.overclean(transitive) To clean to an excessive degree.overcollateralizationThe act or process of overcollateralizing.overcollectionExcessive collection, as:overcollectivizationExcessive collectivization.overcommercialisationAlternative form of overcommercialization.overcommercializationExcessive commercialization.overcommission(uncommon) To commission to an excessive extent.overcommunicationExcessive communication; communicating too much.overcompartmentalizationexcessive compartmentalizationovercompensationAn excess amount provided in one area in an effort to overcome a perceived lack in another area.overcomplicationThe process of overcomplicating.overcompressionExcessive compression.overconcentrationExcessive concentration.overconcernexcessive concernovercondensationExcessive condensationoverconditionTo condition excessivelyoverconsolidationExcessive consolidationoverconstrainTo apply excessive constraints (to).overconsumptionExcessive consumption.overcontextualizationThe result or process of overcontextualizing.overcontractionExcessive contraction.overcontributionA contribution in excess of a standard or expectation.overcoordinationThe presence of a higher than normal coordination numberovercorrectionThe correction of something to an excessive degree, usually resulting in an error in the opposite direction.overcriminalizationExcessive criminalizing: making too many things criminal.overcultivationexcessive cultivationoverdarken(ambitransitive) To make or become too dark.overdecorationExcessive decoration.overdeepen(geography) To erode (a basin or valley) far deeper than the thalweg.overdefinitionThe act or process of overdefining; excessive definition.overdegradationExcessive degradationoverdeliberationDeliberating too much.overdepositionExcessive depositionoverdescriptionExcessive description.overdesign(ambitransitive) To design too specifically or to too great an extent, as by including unnecessary features.overdetectionDetection at levels greater than are actually the caseoverdeterminationThe state or quality of being overdeterminedoverdeviationA deviation from a target that results in more of something than was desired.overdevotionExcessive devotion.overdifferentiationexcessive differentiationoverdigestionExcessive digestionoverdilationexcessive dilationoverdilutionExcessive dilution.overdiscussionExcessive discussion.overdispersion(statistics) The presence of greater dispersion in a data set than would be expected according to the statistical model in use.overdistensionExcessive distensionoverdistentionexcessive distentionoverdistributionAn excessive distribution (especially of money).overdiversificationExcessive diversification.overdivisionThe act or result of overdividing.overdocumentationExcessive documentation.overdomesticationexcessive domesticationoverdrain(transitive) To drain excessively.overdramatisationAlternative spelling of overdramatization.overdramatizationThe act or process of overdramatizing.overdrawnpast participle of overdrawoverdrivenDriven too hard, or beyond normal limits; exhausted.overdrown(transitive, obsolete) To drench or wet to excess.overdrunkenExcessively drunken.overduplicationExcessive duplicationovereatenpast participle of overeatovereducation(of a person) The state of being overeducated; the state when one feels overburdened by their education or has more education than their situation demands.overelaborationexcessive elaboration; going into too much detailoverelevation(medicine) excessive elevationoverelongationExcessive elongation.overenunciationExcessively strong enunciation.overeruption(dentistry) The physiological movement of a tooth lacking an opposing partner in the dental occlusion.overestimation(uncountable) The act of overestimating.overevaluationSynonym of overvaluation.overexaggerationexcessive exaggerationoverexcitationExcessive excitation.overexclusionExcessive exclusionoverexcretion(biology) excessive excretion of somethingoverexertionexcessive exertion; so much exertion that discomfort or injury resultsoverexfoliationexcessive exfoliationoverexhaustionExcessive exhaustion.overexpansionExcessive expansion, especially expansion that is not sustainableoverexpectationAn excessively high expectation.overexplain(transitive) To explain at unnecessary length or in too much detail.overexploitationExcessive and damaging exploitation.overexpression(genetics) The abnormal or artificial expression of a gene in increased quantityoverextensionThe state or quality of being overextended; extension beyond normal, correct, or appropriate bounds or limits.overextentionMisspelling of overextension.overextractionAn excessive extractionoverextrapolationexcessive extrapolation, as when drawing conclusions from dataoverfactorization(statistics) The use or consideration of excessive factors in factor analysis.overfatten(transitive) To fatten excessively.overfawn(transitive) To fawn or flatter grossly or excessively.overfeminizationexcessive feminizationoverfermentationexcessive fermentationoverfertilisationAlternative form of overfertilization.overfertilizationExcessive fertilization; the overuse of fertilizer.overfiltrationExcessive filtrationoverfixationExcessive fixationoverflatten(transitive) To flatten too much.overflexionExcessive flexionoverflownpast participle of overflyoverfortificationExcessive fortification.overfragmentationExcessive fragmentationoverfrighten(transitive) To frighten excessively.overfunction(intransitive) To function excessively.overgainTo gain too much.overgenderizationAlternative form of over-genderization.overgeneralisationAlternative form of overgeneralization.overgeneralization(usually uncountable) The act of overgeneralizing.overgenerationThe generation of too much or too many of something; overproduction.overglamorizationThe process of overglamorizing.overglorificationExcessive glorification; excessive praise.overgovern(ambitransitive) To govern with too much rigidity or precision.overgownA gown worn over other clothing.overgrain(art) To apply an additional layer of colour to graining, or imitation woodgrain.overgranulationhypergranulationovergreen(transitive, poetic) To cover with greenery or a green color.overgrownHaving large numbers of plants which have become too big, and are hence spoiling the picturesqueness of a garden.overhardenTo harden too much.overheighten(transitive) To heighten excessively.overhumanisationAlternative form of overhumanization.overhumanizationExcessive humanization; the process of overhumanizing.overhydrationExcessive hydration.overidealizationexcessive idealizationoveridentificationA case of overidentifying with something.overilluminationExcess light supplied beyond the amount required for a given task.overillustrationExcessive illustration.overimitationExcessive imitation.overimmunization(American spelling) The administration of unnecessary immunizations.overimmunosuppressionexcessive immunosuppressionoverimportationExcessive importation.overimputationExcessive imputationoverincarcerationThe incarceration of an excess number of people.overinclusioninclusion of too much or too many within a categoryoverinductionAn excessive inductionoverindustrializationExcessive industrialization.overinflationExcessive inflation (of vehicle tyres).overinflectionexcessive inflectionoverinfusionExcessive infusionoverinhalationExcessive inhalationoverinhibitionExcessive inhibitionoverinitiationExcessive initiation (typically of a biochemical process)overinstitutionalizationExcessive institutionalization.overinstructionExcessive instruction.overinstrumentation(dentistry, surgery) Use of excessively large surgical instruments in a surgical procedure or the damage caused thereby.overinsulinizationExcessive insulinizationoverintellectualisationAlternative form of overintellectualization.overintellectualizationexcessive intellectualizationoverintensificationExcessive intensification.overinterpretationExcessive interpretation.overinterrogationThe interrogation of a transponder by too many ground stations.overiodisationAlternative spelling of overiodization.overiodizationExcessive iodizationoverionizationExcessive ionizationoverirrigationexcessive irrigationoverjustificationExcessive justification.overlactationExcessive lactation.overladenPacked heavily, especially beyond normal capacity; overloaded.overlainpast participle of overlieoverlaudationExcessive laudation.overlean(transitive) To lean over.overlearnTo learn (something) more than is necessary; to study excessively, to take (something) too much to heart.overleavenTo leaven too much.overlegalizationExcessive legalization.overlegislationexcessive legislationoverlengthen(transitive) To lengthen too much.overlexicalizationThe creation and use of many words or lexical items for a single entity or concept.overlighten(ambitransitive) To make or become too light.overlitigationExcessive litigation.overloosen(transitive) To loosen too much.overlubricationexcessive lubricationovermagnificationexcessive magnificationovermanA person who supervises others; a supervisor, especially in a mine.overmarginThe amount by which something is bigger, stronger, or with greater capacity than the absolute minimum.overmasturbationexcessive masturbationovermedicalisationAlternative form of overmedicalization.overmedicalizationExcessive medicalization.overmedication(medicine) Excessive medicating; overuse of medicationovermethylation(biochemistry) Excessive methylationovermigrationExcessive migrationovermineralizationExcessive mineralization.overmodernExcessively modern.overmodernizationExcessive modernization.overmodificationExcessive modification.overmodulation(telecommunications) The condition where the instantaneous level of the modulating signal exceeds the value necessary to produce 100% modulation of the carrier, resulting in distortion.overmoistenTo add too much liquid when moistening; to make overly moist.overmournTo mourn excessively.overmultiplicationexcessive multiplication (of breeding organisms etc.)overnationalizationExcessive nationalization.overnegation(Buddhism) Excessive negation.overneutralizationThe process of overneutralizing.overnutritionA form of malnutrition in which nutrients are oversupplied relative to the amounts required for normal growth, development, and metabolism.overobjectificationExcessive objectification.overobturation(dentistry) Excessive obturation; overfilling.overoccupationExcessive occupation; the state of being occupied by too many; overcrowding.overoptimizationThe act or process of overoptimizing.overorganisationNon-Oxford British English standard spelling of overorganization.overorganizationToo much organizing.overossificationExcessive ossificationoveroxidationExcessive oxidation (or to a greater than normal extent)overoxygenation(of living tissues or of ecological environments) The state of being overoxygenated; especially, in health care, too much oxygen therapy, typically in patients with pulmonary disease.overparameterizationThe act or result of overparameterizing.overparametrisationAlternative form of overparametrization.overparametrizationExcessive parametrizationoverparticipationExcessive participation.overpartition(transitive) To divide into too many partitions.overpenalization(law) The process of administering excessive punishment, especially in response to crime.overpenetrationExcessive penetration.overperfusionExcessive perfusionoverpersonSynonym of overman.overpersonalisationAlternative form of overpersonalization.overpersonalizationThe act of overpersonalizing.overpersuasionexcessive persuasionoverphosphorylation(biochemistry) Excessive phosphorylationoverpigmentationExcessive pigmentation.overplainExcessively plain.overplan(transitive) To plan in too much detail.overpolarizationExcessive polarization.overpoliticizationexcessive politicizationoverpollutionExcessive pollution.overpopulation(biology, demography) An excessive number of occupants (people, animals, plants, etc.) in a particular area; specifically, when the number of occupants exceeds the ability of that area to provide for them.overprecaution(uncountable) The tendency to exercise more caution than would be necessary.overprecisionThe quality of being overprecise.overpredictionprediction that is erroneously highoverpreoccupationexcessive preoccupationoverpreparationExcessive preparation.overprescriptionPrescription of a drug more frequently than appropriate.overpressurisationAlternative spelling of overpressurization.overpressurizationExcessive pressurization.overpresumptionExcessive presumption.overprocrastinationexcessive procrastinationoverproductionThe production of more of a commodity than can be used or sold.overprojectionExcessive physical projection, typically of the tip of the nose.overproliferationExcessive proliferationoverpromotionExcessive promotion.overpronationThe act of pronating excessively.overpronunciationExaggerated pronunciation.overproportionTo give something excessive proportionsoverpropulsionexcessive propulsionoverprosecutionThe excessive prosecution of some kind of crime.overprotectionThe act of overprotecting.overprotractionExcessive protraction.overprovisionExcessive provision.overprovocationExcessive provocation.overpublicationexcessive publicationoverpunctuationExcessive punctuation.overqualificationThe quality of being overqualified.overquantificationExcessive quantification.overqueen(rare) A superior or supreme queen; a female overking.overquotationexcessive quotationoverransimple past of overrunoverreactionA reaction that is excessive.overreckonTo reckon too highly.overreductionExcessive reductionoverrefrigerationExcessive refrigeration.overregularizationAct of overregularizing.overregulationExcessive regulation: too many rules, especially misguidedly conceived ones.overrejectionThe rejection of too many data values, or too much dataoverrelaxation(mathematics) A technique which, when applied iteratively, can solve certain types of matrix equationoverrenObsolete form of overrun.overrepetitionExcessive repetitionoverrepletionExcessive repletion.overreplicationExcessive replicationoverrepresentation(uncountable) The condition of being overrepresented.overrepressionExcessive repressionoverrestorationThe process of overrestoring.overrestrainTo restrain too much.overrestrictionExcessive restriction.overresuscitation(medicine) The administration of an excessive amount of fluid during an attempt to resuscitate somebody.overretentionExcessive retention.overriddenpast participle of overrideoverridenMisspelling of overridden.overripenTo ripen too much; to become overripe.overrotationexcessive rotationoverrun(transitive) To defeat an enemy and invade in great numbers, seizing the enemy positions conclusively.oversalivation(medicine) Excessive salivation.oversanitizationExcessive sanitization.oversaturationsupersaturation.overscan(television) The additional area around the four edges of a video image, outside of the safe area, that is not normally seen by the viewer.overschematizationExcessive schematization.overscreenTo screen excessivelyoverseason(transitive) To season (flavour) too much.oversecretionExcessive secretion.oversedationExcessive sedationoverseenpast participle of overseeoversegmentation(computing) A division into too many segments, as when attempting to recognize parts of an image.overselectionThe selection of something more often or by more people than would be expected.oversewnpast participle of oversewoversexualizationExcessive sexualization.oversharpen(transitive, chiefly photography) To sharpen too much.overshorten(transitive) To shorten too much; make excessively or inappropriately short.oversialylation(biochemistry) Excessive sialylationoversignificationThe process or result of oversignifying; (attachment of) excessive significance (to something).oversimplificationAn explanation that excludes important information for the sake of brevity, or of making the explanation or presentation easy to understand.oversmanAn overseer or superintendent.oversmenplural of oversmanoversocializationexcessive socializationoversoften(transitive) To soften too much; to make too soft.oversolemnExcessively solemn.oversoonToo soon; prematurely.oversophisticationthe condition of being oversophisticated.overspan(transitive) To reach or extend over.overspecialisationBritish standard spelling of overspecialization.overspecializationExtreme or excessive specialization.overspecificationExcessive specificationoverspeculation(finance) Excessive or very risky speculation.overspinAn excessive amount of spin applied to a projectile such that its nose does not turn down at the summit of the trajectory.overspun(textiles) Too tightly spun.overstabilizationExcessive stabilizationoverstain(transitive) To stain the surface of; besmear.overstarvation(rare) Severe starvation.oversteepen(transitive) To make excessively steep.overstimulationExcessive stimulation.overstrain(ambitransitive) To subject to an excessive demand on strength, resources, abilities, or the imagination.overstratificationexcessive stratificationoverstrewnpast participle of overstrewoverstriddenpast participle of overstrideoversubscriptionA subscription for more than is available.oversubstitutionExcessive substitutionoversulfationExcessive sulfationoversupinationThe act of supinating too much.oversuppression(biochemistry) Excessive suppression (of a gene, hormone etc.)oversweeten(transitive) To make too sweet.overswollenExcessively swollen or puffed up.oversystematizationexcessive systematizationovertakenpast participle of overtakeovertan(transitive, intransitive) To tan excessively.overtaxationexcessive taxationovertensionExcessive tension.overthicken(transitive) To thicken to an excessive degree.overthin(transitive) To make too thin.overthrownpast participle of overthrowovertighten(transitive) To tighten too much.overtrain(ambitransitive) To train too much or too long.overtranscription(genetics) Excessive transcriptionovertranslation(translation studies) The act of overtranslating.overtransmission(genetics) Excessive transmissionovertubulation(pathology) Excessive tubulation (of long bones)overturn(ambitransitive) To turn over, capsize or upset.overurbanizationExcessive urbanizationoverutilisationAlternative form of overutilization.overutilizationExcessive utilization; overuse.overvaccinationexcessive vaccinationovervaluationAn instance of overvaluing.overvascularizationExcessive vascularizationoverventilation(medicine) hyperventilationoverwarnTo warn excessively.overween(ergative) To think too highly or arrogantly of (oneself).overwiden(ambitransitive) To make or become too wide.overwin(transitive, UK dialectal) To overcome; gain one's point; exceed.overwrittenpast participle of overwriteovidepositionSynonym of oviposition.ovinationThe inoculation of sheep with ovine virus against sheeppox.ovinizationSynonym of clavelization (“inoculation of an animal against sheeppox”).oviposition(zoology or paraphilia) The process or instance of ovipositing, laying eggs.oviraptoranAny of several birdlike dinosaurs of the family †Oviraptoridae.oviraptorosaurianAny maniraptoran dinosaur of the clade OviraptorosauriaoviraptosaurianAny maniraptoran dinosaur of the clade Oviraptorosauria.ovispirin(biochemistry) Any of a group of ovine antimicrobial and cytotoxic cathelicidinsovoalbuminAlternative form of ovalbumin.ovocalyxinAny of a class of proteins involved in the formation of avian eggshells.ovocleidinAny of a class of proteins involved in the formation of avian eggshells.ovoflavin(dated, biochemistry) riboflavinovoflavoprotein(biochemistry) A flavoprotein present in egg whiteovoglobulinAny of a class of proteins found in egg white.ovoglycoprotein(biochemistry) A glycoprotein found in hen's egg whiteovolactovegetarianA lacto-ovo-vegetarian.ovomacroglobulin(biochemistry) Any of a class of macroglobulins found in hen's eggsovomucinA trypsin inhibitor found in raw egg white, responsible for its gel properties.ovopositionMisspelling of oviposition.ovoprotectionprotection of the ovary, typically from cancerovorubin(biochemistry) A chromoprotein, present in gastropod eggs, that is a proteinase inhibitor.ovostatin(biochemistry) Any of a class of proteinase inhibitors found in hens' eggs.ovotoxinA toxin found in eggs.ovotransferinMisspelling of ovotransferrin.ovovegetarianA vegetarian whose diet excludes both meat and dairy produce, but includes eggs.ovovitellin(biochemistry) A form of casein found in egg yolkovulation(physiology) The release of an ovum from an ovary.ovulin(biochemistry) A seminal protein that mediates ovulation in fishoxachelinA particular iron chelator and antifungal agent isolated from Streptomycesoxacillin(pharmacology) A narrow-spectrum beta-lactam antibiotic made by chemical modification of penicillin and administered in the form of its hydrated sodium salt C₁₉H₁₈N₃NaO₅S·H₂O to treat infections caused by penicillin-resistant staphylococci.oxadiazonThe herbicide 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-oneoxalan(chemistry) A complex nitrogenous substance, C₃N₃H₅O₃, obtained from alloxan (or when urea is fused with ethyl oxamate).oxalantin(organic chemistry) A nitrogenous substance, C₆H₄N₄O₅, obtained by the reduction of parabanic acid.oxaliplatin(pharmacology) A particular drug used in chemotherapy.oxametacin(pharmacology) A nonsteroidal anti-inflammatory drug.oxamidation(organic chemistry) Any reaction that forms an oxamideoxaprozinA nonsteroidal anti-inflammatory drug.oxathiapiprolinA fungicide containing oxazole, pyrazole and thiazole groupsoxathiin(organic chemistry) A six-membered, unsaturated heterocycle containing four carbon atoms, one sulfur and one oxygen atom and two double bonds, but especially 1,4-oxathiinoxazolomycinAny of a class of antibiotics derived from Streptomyces bacteria.oxdrawnDrawn or pulled by oxen.oxeladinA particular kind of cough suppressant.oxepin(organic chemistry) The unsaturated seven-membered heterocycle containing six carbon atoms, one oxygen atom and three double bonds; it is tautomeric with the epoxide benzene oxideoxfloxacinMisspelling of ofloxacin.oxhornThe horn of an ox.oxibuprocainMisspelling of oxybuprocaine.oxidationThe combination of a substance with oxygen.oxidisationNon-Oxford British English standard spelling of oxidization.oxidizationSynonym of oxidation.oxidoreductin(biochemistry) Any enzyme that catalyses an oxidoreduction (typically of disulphide bonds in proteins)oxidoreduction(chemistry) Synonym of redox reaction.oxilorphan(pharmacology) A particular narcotic.oxiluciferinMisspelling of oxyluciferin.oximation(organic chemistry) Reaction with, or conversion into an oximeoxitriptan(biochemistry) 5-hydroxytryptophan, a naturally-occurring amino acid and chemical precursor as well as a metabolic intermediate in the biosynthesis of the neurotransmitters serotonin and melatonin from tryptophan.oxoanion(chemistry) Any anion derived from an oxoacidoxocarbon(organic chemistry) Any organic compound containing only atoms of carbon and oxygenoxoerythromycin(organic chemistry) A ketone derived from erythromycinoxoionSynonym of oxoanion.oxoironA hypervalent form of iron formed by binding with an oxygen atomoxolation(inorganic chemistry) A condensation reaction in which an oxo bridge is formed between two metal centres.oxolin(medicine) The antiviral compound 1,2,3,4-tetrahydrotetraoxonaphthaleneoxon(organic chemistry) Any organic compound derived from another in which a phosphorus-sulfur bond in the parent has been replaced by a phosphorus-oxygen bond in the derivative.oxonian(mineralogy) Containing oxygen.oxskinThe hide of an ox.oxyamination(organic chemistry) Any reaction in which an oxygen atom (or, typically, a hydroxide group) and an amino group is added across a double bondoxyanion(chemistry) Any anion derived from an oxyacidoxyanthrarufin(organic chemistry) 1,2,5-trihydroxyanthraquinoneoxyarylation(organic chemistry) Any addition reaction in which an oxygen atom and an aryl group are added across a double bond or triple bondoxybromination(organic chemistry) Simultaneous oxygenation and brominationoxybutynin(pharmacology) An antispasmodic and anticholinergic drug C₂₂H₃₁NO₃ administered transdermally as a skin patch or orally in the form of its hydrochloride C₂₂H₃₁NO₃·HCl to relax the smooth muscles of the bladder in the treatment of urge incontinence, frequent urination, and urinary urgency.oxycarboxinA particular fungicide.oxycationA polyatomic ion that has at least one oxygen atom and an overall positive charge.oxychlorination(organic chemistry) Simultaneous oxygenation and chlorinationoxychrysazin(organic chemistry) 1,2,8-trihydroxyanthraquinoneoxycinchophen(organic chemistry, pharmacology) An antirheumatic drug.oxycontinAlternative letter-case form of OxyContin.oxycotton(slang) Oxycodone used as a recreational drug.oxydehydrogenation(organic chemistry) dehydrogenation by reaction with oxygenoxyfluorfenThe herbicide 2-chloro-α,α,α-trifluoro-p-tolyl 3-ethoxy-4-nitrophenyl ether.oxyfluorination(organic chemistry) Simultaneous oxygenation and fluorinationoxyfunctionalization(organic chemistry) oxidative functionalizationoxygen(loose but very common, even in formal use) Molecular oxygen (O₂), a colorless, odorless gas at room temperature.oxygenationThe process of reacting or treating something with oxygen.oxygenian(mineralogy) Containing oxygen.oxygon(geometry, archaic) An acute triangle.oxyhaemochromogenAlternative form of oxyhemochromogen.oxyhaemocyanin(biochemistry) haemocyaninoxyhaemoglobin(biochemistry) The form of haemoglobin, loosely combined with oxygen, present in arterial and capillary blood.oxyhalogenation(organic chemistry) Simultaneous oxygenation and halogenationoxyhemocyanin(biochemistry) The blue pigment that is an oxygenated form of hemocyaninoxyhemoglobin(American spelling) Alternative form of oxyhaemoglobin.oxyhydrochlorinationA specific type of hydrochlorination, where oxygen is used as an oxidizing agent in addition to hydrogen chloride.oxyhydrogenOf, or using a mixture of, hydrogen and oxygen.oxyiminocephalosporinAn oxyimino derivative of a cephalosporinoxyiodination(organic chemistry) Simultaneous oxygenation and iodinationoxylipin(biochemistry) oxygenated natural products which are formed from fatty acids by pathways involving at least one step of dioxygen-dependent oxidation; many of them have physiological importanceoxyluciferin(biochemistry) The luminescent product of the oxidation of luciferin by luciferaseoxymercuration(organic chemistry) An addition reaction in which the elements of water are added across an alkene's double bond to form an alcohol; the reaction proceeds via the addition of mercuric acetate, the mercuric group being removed by reductionoxymoron(rhetoric) A figure of speech in which two words or phrases with opposing meanings are used together intentionally for effect.oxymyoglobinThe substance resulting from exposure of myoglobin to oxygen, responsible for the red colour of meat.oxyneolignan(organic chemistry) Any compound having a structure based on a oxyneolignaneoxyntomodulin(biochemistry) A polypeptide hormone found to suppress appetite.oxypalladation(organic chemistry) Any addition reaction in which an oxygen atom and a palladium atom are added across a double bond or triple bond (normally to form a reactive intermediate)oxypeucedanin(organic chemistry) A coumarin found in the plant Angelica archangelica.oxyregulation(physiology) The regulation of oxygen in animals and plantsoxytalanA fibrous component of the extracellular matrix of teethoxythiaminAlternative form of oxythiamine.oxytocin(biochemistry) A hormone that stimulates contractions during labor, and then the production of milk; also plays a role in social bonding.oyabunThe absolute leader of a yakuza clan. He has an advisor called a saiko-komon.oyakodonA Japanese dish of chicken, egg, sliced scallion, etc. simmered in soup and served on top of rice.oynounObsolete form of onion.oystermanA person who cultivates, harvests or sells oystersoystermenplural of oystermanoysterwomanA woman who sells oysters.ozenoxacinA quinolone antibiotic used to treat impetigo.ozogamicin(pharmacology) An antitumor antibiotic of the calicheamicin class.ozogen(dated) An aqueous solution of hydrogen peroxide formerly used as a disinfectant.ozonation(chemistry) The act of treating with ozone.ozonification(chemistry) ozonizationozonisationAlternative spelling of ozonization.ozonizationReaction or treatment with ozone.