Browse Other O Word Lengths
12-Letter O Words by Ending Letter
All 1,296 12-Letter Words Starting With O
oasificationThe process of restoring water, soil, and plant life to an environment that has been degraded by soil erosion.oathbreakingThe violation of an oath; perjury.obambulation(obsolete) Wandering about; a casual outing.obcompressedCompressed or flattened anteroposteriorly, or in a way opposite to the usual one.obduratenessThe characteristic of being obdurate; stubbornness.obedienciary(obsolete) One yielding obedience.obedientiaryThe holder of a monastic rank or office below that of superior.obedientnessQuality of being obedient.obesogenesisThe creation of obesityobfuscatable(rare) Which can be obfuscated.obfuscationsplural of obfuscationobinutuzumab(pharmacology) Synonym of afutuzumab.objectifyingpresent participle and gerund of objectifyobjectionismA policy of objecting to something; opposition.objectionistOne who objects to some action or policy.objectivisedsimple past and past participle of objectiviseobjectivizerOne who objectivizes.objectivizesthird-person singular simple present indicative of objectivizeobjectlesslyWithout a purpose.objurgationsplural of objurgationoblanceolate(botany, of leaves) Of a reversed lanceolate shape: attached to the stem by the pointed end, with the other end rounded.obligability(philosophy) The quality of being obligable.obligationalPertaining to, or in the nature of, obligation.obligatorilyIn an obligatory manner.obligatorize(linguistics) To make (something) obligatory, or more obligatory.obligingnessThe quality of being obliging; the tendency to cater for the desires of others.obliteratingpresent participle and gerund of obliterateobliterationThe total destruction of something.obliterativeTending or serving to obliterate.obliteratorsplural of obliteratorobliterature(literary criticism) Forms of literature that are somehow obliterated or void, for example, by being interpreted in a way not intended by the original author.oblivescence(formal) forgetting; state of being forgottenobliviscence(obsolete) Forgetfulness.obmutescenceSilence; inability or refusal to speak.obnubilationThe action of darkening or fact of being darkened, as with a cloud; obscuration.obradovicite(mineralogy) An orthorhombic-dipyramidal pea green mineral containing arsenic, copper, hydrogen, iron, molybdenum, oxygen, potassium, and sodium.obreptitiousDone or obtained by surprise, with secrecy, or by concealment of the truth.obscurantismA state of opposition to human progress or enlightenment.obscurantistA practitioner of obscurantism; an obscurant.obscurationsplural of obscurationobsecrationsplural of obsecrationobsequiosityObsequiousness.obsequiouslyIn an obsequious manner.observationsplural of observationobserverlessWithout observers.observershipThe office or work of an observer.obsessednessThe quality of being obsessed; obsession.obsessionismObsessiveness.obsessionistA person who has an obsession; an obsessive.obsolescence(uncountable) The state of being obsolete—no longer in use; gone into disuse; disused or neglected.obsoletenessThe quality or state of being obsolete or no longer in use.obstetricate(obsolete) To assist in the manner or as if in the manner of a midwife.obstetrician(medicine) A physician who specializes in childbirth.obstetricistOne who practices obstetrics; an obstetrician.obstinacious(US, regional, dated) obstinateobstrepalous(nonstandard or dialect) obstreperousobstreperateTo make a loud noise.obstreperousAttended by, or making, a loud and tumultuous noise; boisterous.obstropalousAlternative form of obstropulous.obstropolousAlternative form of obstropulous.obstropulous(UK, obsolete, slang) Synonym of obstreperous.obstructedlyWhile being obstructed.obstructionsplural of obstructionobtrectation(obsolete) Disparagement, the belittling of someone or something; slander.obtriangulartriangular with the apex downwardsobtruncation(formal) The act of lopping or cutting off.obtundedness(medicine) The quality or state of being obtunded; non-alertness.obturationalOf or relating to obturation.obturatorius(anatomy) The obturator nerveobtusangularobtuse-angledobtusifoliolA phytosterol found in some vegetable oil.occasionableCapable of being occasioned or causedoccasionably(archaic) occasionallyoccasionallyOn occasion: at relatively infrequent intervals, from time to time, sometimes.occasionlessWithout occasion.occasionwearclothing to be worn on special occasionsoccidentallyIn an occidental manner.occipitalgia(pathology) pain in the occiputocclusometerA gnathodynamometer.occulticallyIn an occultic manner.occupantlessWithout any occupant.occupationalOf, belonging, or relating to an occupation (in any sense).occurrentialOf, pertaining to, or essentiating an occurrence or occurrences; occurrent.oceanographyThe exploration and scientific study of the oceans and ocean floor.oceanologistOne who studies oceanology.ocelliferousHaving spots like small eyes.ocelligerousocelliferousocellorbitalRelating to the ocellus and the orbit of the eyeochlophobiacSynonym of ochlophobe.ochlophobist(obsolete, rare) A person with a phobia, or fear, of mob-like crowds, as opposed to simply open spaces like agoraphobia or large crowds as with enochlophobia.ochlospecies(taxonomy) A taxonomic species concept characterized by large amounts of variation that is not correlated with geography or ecology; usually geographically widespread and having variants that may be consistently distinguishable locally but not globally.ochnaflavone(organic chemistry) A particular biflavonoid found in the plant Ochna squarrosa.ochrephilone(organic chemistry) The chromenone (6aR,9R,9aR)-9-acetyl-3-[(1E,3E,5S)-3,5-dimethylhepta-1,3-dienyl]-6a-methyl-9,9a-dihydrofuro[2,3-h]isochromene-6,8-dioneochroleucousYellowish-white; having a faint tint of dingy yellowoctachloride(chemistry) Any chloride containing eight chlorine atoms in each molecule.octacontagon(geometry) A polygon with 80 sides and 80 angles.octacosanoicOf or pertaining to octacosanoic acid or its derivatives; montanicoctadecanoicOf or pertaining to octadecanoic acid or its derivativesoctadecanoid(organic chemistry) Relating to octadecanoic acid and its derivatives, but especially to polyunsaturated forms that are involved in the biosynthesis of jasmonic acidoctadecanoyl(organic chemistry, especially in combination) The univalent radical derived from octadecanoic acid by loss of the hydroxy group; stearoyloctadecenoicOf or pertaining to octadecenoic acid or its derivatives; oleic.octadecenoyl(organic chemistry, especially in combination) The univalent radical derived from octadecenoic acid by loss of the hydroxy group; oleoyloctagenarianMisspelling of octogenarian.octahedrallyIn an octahedral manneroctangularlyIn an octangular manner.octanoylatedreacted with octanoic acidoctasilicate(chemistry, in combination) Eight silicate anions or groups in a molecule.octasiloxane(organic chemistry) Any siloxane having eight -Si-O- groupsoctastichous(botany) Having a phyllotaxis of eight leaves in each spiral around a stemoctasyllabicA word of eight syllables.octocellularHaving eight cells.octodecanoidMisspelling of octadecanoid.octogenarianSynonym of eightysomething: a person between 80 and 89 years old.octopetalous(botany) Having eight petals.octopodiformA cephalopod of the superorder Octopodiformes, comprising octopuses and vampire squid.octopusesque(rare) Octopuslike; resembling an octopus.octopyranose(biochemistry) The pyranose form of an octoseoctoradiatedHaving eight rays.octospermousHaving eight seeds.octostichous(botany) octastichousoctosyllabicContaining eight syllablesoctosyllable(poetry) line of verse with eight syllablesoctriptylineA tricyclic antidepressant.octupolarity(physics) The condition of being an octupoleoculauditoryAlternative form of oculoauditory.oculocardiacRelating to the eyes and heart; applied to a reflex where a decrease in pulse rate is associated with traction applied to extraocular muscles and/or compression of the eyeball.oculocentricPassing through the oculocentreoculodigital(pathology) Relating to the eyes and the fingersoculogenesisThe growth and development of the eye (in the foetus)oculogenitalRelating to the eyes and genitals.oculographicRelating to oculographyoculolinctusA paraphilia involving licking the eyeballs.oculometricsSynonym of oculometry.oculonasallyIn an oculonasal manneroculopalatalRelating to the eye and the palateoculoplasticRelating to oculoplastics.oddification(mathematics) Conversion to an "odd" formoddvertisingquirky advertisingodontaspidid(zoology) Any shark in the family Odontaspididae.odontasterid(zoology) Any starfish in the family Odontasteridaeodontoblastsplural of odontoblastodontofacialRelating to the teeth and the faceodontography(archaic) A scientific description of the teeth.odontolithus(obsolete) dental tartar; odontolithodontologistA specialist in odontology.odontomatousRelating to an odontoma.odontometricRelating to odontometricsodontophobiaAn irrational fear of dentistry.odontophobicHaving an irrational fear of dentistry.odontophoralRelating to the odontophore.odontophorid(zoology) Any quail in the family Odontophoridae.odontoplasty(dentistry) A procedure that adjusts a tooth's size, shape or length through the selective removal of small amounts of enamelodontotechny(dentistry) The technical devices and items that are used in the practice of dentistry and orthodontia.odorlessnessAbsence of odor.odorobiosideA particular steroid glycoside.odouriferousObsolete form of odoriferous.odourisationAlternative form of odorization.odourizationAlternative form of odorization.odourousnessMisspelling of odorousness.oecumenicismAlternative form of ecumenicism.oecumenicityObsolete form of ecumenicity.oenochemical(chemistry) Relating to oenochemistryoenocyteless(biology) That lacks an oenocyteoesophagitis(British spelling) Alternative form of esophagitis.oesophagusesplural of oesophagusoesteocalcinAlternative form of osteocalcin.oestrogenismAlternative form of estrogenism.offendednessThe state or quality of being offended.officeholderA person who holds an office, especially one appointed or elected to a public office.officeseekerA candidate for office, often specifically political officeofficeworkerAlternative form of office worker.officialdomsplural of officialdomofficialhood(rare) The state or condition of being official; officialityofficialisedsimple past and past participle of officialiseofficializedsimple past and past participle of officializeofficializesthird-person singular simple present indicative of officializeofficialnessThe quality of being official.officialshipThe position or role of an official.officiationsplural of officiationoffputtinglyIn an offputting manner.offshoreableAlternative form of offshorable.offspringingSpringing off or outward; developing from something else.oflactometerMisspelling of olfactometer.oftmentionedAlternative spelling of oft-mentioned.ogcocephalid(zoology) Any member of the family Ogcocephalidae.ohmefentanyl(pharmacology) A particular narcotic painkiller.oidiomycosisinfection with Oidium species; blastomycosisoidiomycoticOf or relating to oidiomycosis.oiltightnessThe quality of being oiltight.ointmentlikeResembling or characteristic of ointment.olallieberryA hybrid berry with a tart taste created by crossing a loganberry and a youngberry.oldfashionedRare form of old-fashioned.oleaginicityThe condition of being oleaginousoleaginouslyIn an oleaginous manner.oleandomycin(pharmacology) A macrolide antibiotic produced by Streptomyces antibioticus.olekminskite(mineralogy) A trigonal-trapezohedral mineral containing barium, calcium, carbon, oxygen, and strontium.oleochemical(organic chemistry) Any organic compound derived from a natural vegetable oil or animal fatoleoresinousOf or relating to oleoresin.olericultureThe field of horticulture dealing with the production, storage, processing and marketing of vegetablesolethreutineAny moth of the tribe Olethreutiniolfactomedin(biochemistry) Any of a class of polymeric glycoproteins that are a major component of the extracellular matrix of olfactory neuroepitheliumolfactometerA device used to measure the acuity of a person's sense of smell.olfactometryThe study and measurement of smells.olfactomotor(biology) Of or pertaining to both olfactory and motor activity, as for example where thinking about an odor triggers sniffing.olfactotoxictoxic to the olfactory systemolfactronicsThe design and use of machines to analyze smells.oligoalanine(biochemistry) An oligomer of alanine as part of a peptideoligoaniline(organic chemistry) Any of a class of compounds containing short strings of aniline residues fused into polycyclic structuresoligocapture(genetics) The capture of reasonably large DNA fragments for sequencingoligocentricHaving, or originating from, several centresoligochaetesplural of oligochaeteoligocultureThe cultivation of several crops togetheroligodactylyThe presence of fewer than the usual number of fingers or toes.oligodextrin(biochemistry) An oligomeric form of dextrinoligodynamicThat is active in small quantities; used especially to describe the sterilizing effect of some heavy metals against bacteriaoligoelementSynonym of trace element.oligofructan(biochemistry) Any oligosaccharide composed of fructose residues.oligogenesis(biochemistry) The creation of biochemical oligomersoligogeneticAlternative form of oligogenic.oligoglycine(organic chemistry) An oligopeptide composed of glycine residuesoligoguanine(biochemistry) Any oligomer of guanine (as part of a nucleic acid)oligohexamer(organic chemistry) An oligomer composed of hexamersoligolactone(organic chemistry) An oligomeric lactoneoligomannose(biochemistry) A glycan that is an oligomer composed of mannose unitsoligomineral(Of water) Having few dissolved minerals.oligomorphicHaving several different forms, but not fully polymorphicoligoneuriidAny mayfly of the family Oligoneuriidaeoligonodular(medicine) Characterized by a small number (often fewer than five) of nodules.oligonuclearHaving few / several nucleioligonucleicRelating to oligonucleotides or oligonucleosidesoligopeptide(biochemistry) A peptide containing a relatively small number of amino acidsoligophagismSynonym of oligophagy.oligophagous(chiefly of insects) that feed on a restricted range of foodoligophrenia(pathology) subnormal mental developmentoligophrenicExhibiting, or relating to, oligophrenia.oligophrenin(biochemistry) Any of a family of proteins that modulate cytoskeletal changesoligoplastic(dated, pathology) Having little capacity to produce, or to repair damage to tissueoligopolymerA polymer which occurs naturally in crude oil, or in one of its basic refractory components, usually a mixture of 2 or more polymers.oligopotencyThe state or condition of being oligopotent.oligopsonist(economics) Any of a relatively small number of buyers of a product or serviceoligopyrrole(organic chemistry) Any of a group of compounds based on a short string of pyrrole rings joined togetheroligosaprobe(ecology) Any oligosaprobic organismoligosilanyl(inorganic chemistry) A univalent radical derived from an oligosilaneoligosorbentA material that will absorb a few different substancesoligospermia(medicine) Low volume of semen.oligospermicHaving or relating to oligospermia.oligosulfide(chemistry) Any salt or ester containing a chain of several sulfur atomsoligotherapy(alternative medicine) The supposed therapeutic use of trace elements.oligotrichidAny ciliate of the order Oligotrichidaoligotrophic(physiology, of a diet) deficient in nutrition (providing little nourishment)oligouridine(biochemistry) An oligomer composed of uridine monomersolistostromeA sedimentary deposit composed of a chaotic mass of heterogeneous material, such as blocks and mud, known as olistoliths, that accumulates as a semifluid body by submarine gravity sliding or slumping of the unconsolidated sediments.olivegrowingThe growing of olives for commercial purposes.ollalieberryAlternative form of olallieberry.ollapodridasplural of ollapodridaolpidiaceous(mycology, relational) Of or relating to the Olpidiaceae.olshanskyite(mineralogy) A triclinic-pinacoidal mineral containing boron, calcium, hydrogen, and oxygen.olutasidenibAn anticancer medication used to treat relapsed or refractory acute myeloid leukemia.ombrophilous(biology) Capable of thriving in areas of heavy rainfallombrophobousSynonym of ombrophobic.ombrophylousMisspelling of ombrophilous.ombrothermicRelating to, or representing rainfall and temperatureombrotrophicPertaining to ombrotrophy.ombudspeopleplural of ombudspersonombudsperson(gender-neutral) Synonym of ombudsman.omentoplasty(surgery) repair of the omentumomissibilityCapability of being omitted.omissivenessThe quality of being omissive.omittabilityThe capability of being omitted.ommastrephid(zoology) Any squid in the family Ommastrephidae.ommatophoresplural of ommatophoreomnibibulous(rare) Able, or likely able, to drink almost anything (alcoholic).omnibuilding(architecture) A megastructure.omniculturalRelating to all culturesomnigatherumomnium-gatherumomnilinguist(very rare) Synonym of omnilingual.omniphibiousOf an aircraft: able to land on water and on all kinds of terrain.omnipotencesplural of omnipotenceomnipotentlyIn an omnipotent manner.omnipresenceThe ability to be, or the characteristic of being, at all places at the same time (usually only attributed to God).omnipresencyObsolete spelling of omnipresence.omnirelevantRelevant everywhere, or to everything; always relevant.omniscientlyIn an omniscient manner; with omniscience.omnisentientHaving omnisentience, a sensory awareness of all things.omnisexuallyIn an omnisexual manner.omnishambles(UK, informal, chiefly politics) A situation that is bad or mismanaged in every way.omnispectiveBeholding everything; all-seeing.omnitemporalapplicable at all timesomnitheisticExhibiting or relating to omnitheism.omnitoleranttolerant of everythingomnivoracityThe condition of being omnivorousomnivorouslyIn an omnivorous manner.omodysplasiaA severe shortening of the limbs and dysmorphism of the skullomphalectomy(surgery) The excision of the navel.omphalocoeleAlternative form of omphalocele.omphalomancyDivination by means of a child's navel, to learn how many children the mother may have.omphalopagus(medicine, of conjoined twins) Joined at the umbilicus.omphaloscopyNavel-gazing; introversion.onchocercoma(pathology) A nodule containing Onchocerca in river blindness (onchocerciasis).oncocalyxone(organic chemistry) Any of a group of analgesic anthraquinones present in Auxemma oncocalyxoncogenetics(genetics, pathology) The study of the genetic origin of cancersoncogenicityThe state or degree of being oncogenic.oncogenomics(medicine) The study of the relationship between the genome of an individual and canceroncogenotypeAny genotype associated with canceroncomutationA mutation associated with a canceronconeuronalRelated to cancer and to neurological syndromesoncopathogenAny oncogenic pathogenoncoproteomeA proteome of oncoproteins.oncoribosome(biology) A specialised ribosome associated with a canceroncornaviralRelating to oncornaviruses.oncornavirusAny of a group of RNA viruses, of the subfamily Oncornvirinae in the family Retroviridae, that cause tumors in various animals and in humans.oncosurgical(surgery) Relating to cancer surgery.oneirocriticAn interpreter of dreams.oneirologistAn interpreter of dreams.oneiromancerOne who practises oneiromancy.oneiromancieObsolete spelling of oneiromancy.oneirophobiaThe fear of dreams.oneiroscopicRelating to the interpretation of dreams.onesidednessAlternative form of one-sidedness.oneupmanshipAlternative spelling of one-upmanship.onikulactone(organic chemistry) A cat attractant found in Boschniakia rossica.onoceradiene(organic chemistry) Any of a group of triterpene hydrocarbons, such as (4aS,8aS,4a'S,8a'S)-8,8'-(1,2-ethanediyl)bis(4,4,7,8a-tetramethyl-1,2,3,4,4a,5,6,8a-octahydronaphthalene), found in the fern Lemmaphyllum microphyllumonocleaceous(botany, relational) Of or relating to the Onocleaceae.onomasiology(linguistics) A branch of lexicology concerned with the names of concepts.onomasticianA person who studies onomastics; one who studies or researches names.onomatapoeiaMisspelling of onomatopoeia.onomatoclast(rare, Eastern Orthodoxy, derogatory) An opponent of onomatodoxy.onomatomancySynonym of onomancy.onomatomaniaAn abnormal obsession with a particular word.onomatophore(biology, taxonomy) A specimen that serves to bear a taxonomic name, as a type.onomatopoeia(uncountable) The property of a word that sounds like what it represents.onomatopoeicOf or relating to onomatopoeia.onomatopoesyThe use of onomatopoeia.ontologisticOf or relating to ontologism.ontotheologyThe ontology of God and/or the theology of being; a tradition of philosophical theology first prominent among medieval scholastics, notably Duns Scotus.onychochilid(zoology) Any extinct gastropod in the family Onychochilidae.onychodontid(zoology) Any extinct fish the family OnychodontidaeonychopathicRelating to onychopathy.onychophagia(psychology, psychiatry) Nail biting.onychophoran(zoology) Any of many wormlike carnivorous ecdysozoan animals of the phylum Onychophora.onychoptosisSynonym of onychomadesis.onychostroma(anatomy) The matrix or sensitive tissue of the finger, forming the bed of the nail.onygenaceous(mycology) Belonging to the Onygenaceae.oolitiferous(obsolete, rare) Bearing oolite.oopherectomy(surgery) Oophorectomy.oophorectomy(medicine, surgery) Surgical removal of one or both ovaries.oosporangium(botany) An oogonium.opalescentlyIn an opalescent manner.openhandedlyAlternative form of open-handedly.openmindedlyAlternative form of open-mindedly.operaticallyIn an operatic manner.operationism(philosophy) The doctrine that the meaning of a term consists of the operation(s) performed in defining itoperationistA proponent of operationism.operatorlessWithout an operator (person who operates); fully automatic.operatorshipThe office of an operatoroperculationThe condition of being operculateoperculiform(botany, zoology) Having the form of a lid or cover.operonicallyIn an operonic mannerophiacanthidAny brittle star of the family OphiacanthidaeophicleidistSomeone who plays the ophicleide.ophidiophobeAn ophiophobe; one who fears snakes.ophiocarpine(organic chemistry) A protoberberine alkaloid.ophioglossid(botany) An adder's tongue fern, or one similar to such a fern.ophiolatroussnake-worshippingophiolepididAny brittle star of the family Ophiolepididae.ophiologicalOf or relating to ophiology.ophiomorphicsnake-shaped; serpentineophiophagous(zoology) Feeding on snakes.ophiophilistSynonym of ophiophile (“person who loves snakes”).ophiopluteus(zoology) A free-swimming larval stage of some brittle stars, having four pairs of rigid arms lined with cilia.ophiopogoninA particular steroid glycoside.ophiothamnidAny brittle star of the family Ophiothamnidaeophiothricid(zoology) Any in the family Ophiotrichidae of brittle stars.ophiotrichid(zoology) Any brittle star in the family Ophiotrichidae.ophiuroideanAny brittle star of the class OphiuroideaophthalmitisSevere conjunctivitis (inflammation of the conjunctiva).ophthamologyMisspelling of ophthalmology.opilioacarid(zoology) Any mite in the family Opilioacaridae.opilionology(rare) The study of the Opiliones or harvestmen.opiniastrous(obsolete) opinionatedopiniativelyArchaic form of opinionatively.opinionatelyIn a conceited manner.opinionationThe quality of being opinionated.opinionatistObsolete spelling of opinionist.opinionativeOf, pertaining to, being, or expressing opinion.opinionmakerOne who influences the public in their opinions.opinionnaireA form containing a list of statements, each of which the members of a selected group are asked to endorse or reject; the purpose being to gather information for a survey.opisthoclineleaning backwardsopisthocoelyThe condition of being opisthocoelousopisthocomid(zoology, ornithology) Any bird of the family Opisthocomidae, which comprises the hoazin and extinct relatives.opisthodomos(Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella.opisthoglyphAny opisthoglyphous snake.opisthograph(historical) Any early document (such as a roll of papyrus) that has writing on the back as well as the front.opisthonotal(entomology) opisthosomal and dorsalopisthopubic(anatomy) Having the pubis bones pointing backward, as in some dinosaurs.opisthorchidAny fluke of the family Opisthorchiidae.opisthosomalRelating to the opisthosoma.opisthotonicRelating to opisthotonus.opisthotonos(medicine) Sustained tetanic spasm in which the body is bent backwards and stiffened, as produced by various diseases.opisthotonusAlternative form of opisthotonos.opistothorax(zoology) A wormlike segmented extension to the thorax.opportunistsplural of opportunistopposabilityThe condition or quality of being opposable (capable of being placed opposite to something else).oppositenessThe state or condition of being opposite.oppositionalOf, pertaining to, or exhibiting opposition.oppositivelyIn an oppositive manner.oppressinglySo as to oppress; with or by means of oppression; oppressively.oppressionalExhibiting or relating to oppression.oppressivelyIn an oppressive manner.oppugnanciesplural of oppugnancyopsinizationMisspelling of opsonization.opsoniferousBearing opsonin.opsonisation(British spelling, immunology) Alternative spelling of opsonization.opsonization(immunology) The process or result of opsonizingopsonophiliaAffection to opsonin.opsonophilicRelating to opsonophilia.opthaldehyde(organic chemistry) ortho-phthalaldehydeopthalmologyMisspelling of ophthalmology.opticospinalOf, pertaining to, or affecting the optic nerve and the spinal cordoptimisationAlternative spelling of optimization.optimizationThe design and operation of a system or process to make it as good as possible in some defined sense.optioneeringin-depth consideration of various alternatives to find the best or preferred optionoptoacoustic(physics) Describing any of several interactions between light and soundoptochemical(physiology) Relating to the chemical processes involved in sight or visionoptocouplersplural of optocoupleroptodynamics(physics) A range of dynamic measurement techniques that use small lasers.optoejectionoptical ejectionoptoelectric(physics) Of or pertaining to the conversion of light energy into electricityoptofluidicsThe science of optical devices incorporating fluids, especially such microfluidic devicesoptogalvanic(physics) Describing any effect of light upon the electrical conductivity of a materialoptogenetics(genetics) A science that combines optics and genetics, aiming at controlling cellular processes with light. The cells are made responsive to light using genetics and then activated using specific wavelengths.optoisolatedisolated by means of an optoisolatoroptoisolatorA device that transmits a signal optically between two isolated electronic circuitsoptomagnetic(physics) optical and magnetic; related to optomagnetismoptomagnonic(physics) Relating to optical magnons or to optomagnonicsoptometricalOf or pertaining to optometry.optomologistMisspelling of ophthalmologist.optoporationSynonym of photoporation.opuntiaceous(botany, rare, obsolete) Belonging to the family Opuntiaceae (now mostly subfamily Opuntioideae in Cactaceae).orangishnessThe quality or state of being orangish: somewhat orange, orange-like, or somewhat like an orange.orangoutangsplural of orangoutangoratoricallyIn an oratorical manner.orbicularian(zoology) Any spider of the clade Orbiculariae.orbicularityThe quality of being orbicular.orbiculatelyIn an orbiculate manner.orbiculationThe state or quality of being orbiculate.orbifloxacin(pharmacology) A fluoroquinolone antibiotic.orbifoldized(mathematics) Converted to, or considered as an orbifoldorbiliaceous(mycology, relational) Of or relating to the Orbiliaceae.orbitational(astronomy) Of, or related to an orbit or orbiting.orbitographyThe determination and positioning of satellite orbits by a form of geodesyorbitomeatalRelating to the orbit of the eye and the meatus of the earorbitomedial(anatomy) Relating to the orbital gyrus and the medial prefrontal cortexorbitomesialAlternative form of orbitomedial.orchardgrassAny of various grasses of the genus Dactylis, especially Dactylis glomerata.orchardhouseA building in or next to an orchard in which saplings are grown.orchestrallyIn an orchestral manner.orchestratedsimple past and past participle of orchestrateorchestraterAlternative form of orchestrator.orchestratesthird-person singular simple present indicative of orchestrateorchestrator(music or figurative) One who orchestrates.orchestrelle(historical, music) A player organ designed to mimic the sound of an orchestra, manufactured and used from the late 19th century to early 20th century.orchestrionsplural of orchestrionorchidaceous(botany) Of or pertaining to orchids.orchidectomySynonym of orchiectomy.orchideologyAlternative form of orchidology.orchidomaniaAn obsession with orchids; enthusiasm for raising or collecting orchids, especially in the Victorian era.orchidometerAn instrument used to measure the volume of the testiclesorchidometryThe measurement of the volume of the testiclesorchidophileAn orchid enthusiast.orchitogenic(pathology) That produces orchitisorderabilityThe quality of being orderable.ordinability(obsolete) Capability of being ordained or appointed.ordinarinessThe quality or condition of being ordinary.ordinaryshipThe state or business of an ordinary.oreochromineAny cichlid of the tribe Oreochrominioreopithecid(zoology) Any extinct hominid in the family Oreopithecidae, a synonym of the hominid subfamily Dryopithecinae.organbuilderA person who makes organs (musical instruments).organellular(biology) Relating to, or functioning via organelles.organicisticRelating to organicism.organigramme(British, management) An organization chart.organisationNon-Oxford British English and Australian standard spelling of organization.organistshipThe role or status of an organist.organization(uncountable) The quality of being organized.organizatoryRelating to organization.organobarium(organic chemistry) Describing any organic compound containing a carbon-to-barium bond.organoborane(organic chemistry) Any organic compound containing a carbon-to-boron bond.organocarbon(organic chemistry) Describing any organic compound containing a carbon to carbon bond.organocation(organic chemistry) Any cation formed from an organic compoundorganocerium(organic chemistry) Describing any organic compound containing a carbon to cerium bond.organocesium(organic chemistry) Describing any organic compound containing a carbon to cesium bond.organocobalt(organic chemistry) Describing any organic compound containing a carbon to cobalt bond.organocopper(organic chemistry) Describing any organic compound containing a carbon to copper bondorganoerbium(organic chemistry) Describing any organic compound containing a carbon to erbium bond.organography(biology) The scientific description of the structure and function of the organs of living organisms.organohalide(organic chemistry) An organic halide, an organic compound containing one or more substituted halogen atoms.organohybrid(organic chemistry) A material composed of two (typically related) organic compoundsorganoindium(organic chemistry) Describing any organic compound containing a carbon-to-indium bond.organoiodide(organic chemistry) Any organic iodideorganoiodine(organic chemistry) Describing an organic compound containing one or more iodine atoms.organolepticOf or pertaining to the sensory properties of a particular food or chemical, the taste, colour, odour, and feel.organologistOne who studies organology.organomegaly(pathology) The abnormal enlargement of an organorganonickel(organic chemistry) Describing any organic compound containing a carbon to nickel bondorganoosmium(organic chemistry) Describing any organic compound containing a carbon-to-osmium bond.organooxygen(organic chemistry) Describing any organic compound containing a carbon to oxygen bond.organopathicRelating to organopathy.organoperoxy(organic chemistry) Any organic peroxy radical (R-O-O-)organophilicHaving an affinity for organic substancesorganoplasty(surgery) The correction of malformations of organsorganoponicsA system of urban agriculture using organic gardens, often low-level concrete walls filled with organic matter and soil, with lines of drip irrigation laid on the surface of the growing media.organosilane(organic chemistry) Any organic derivative of a silane containing at least one carbon to silicon bondorganosilene(chemistry) a molecule containing a silicon atom doubly bonded to a carbon atomorganosilica(chemistry) Any of a range of hybrid materials combining silica with various organic compoundsorganosilver(organic chemistry) Describing any organic compound containing a carbon-to-silver bond.organosodium(organic chemistry) Describing any organic compound containing a carbon to sodium bond.organosulfur(organic chemistry) Any such organic compound.organotrophy(biology) The condition of an organism obtaining its energy from organic compounds.organotropicHaving an affinity for a particular bodily organorgasmicallyIn an orgasmic way.orgasticallyIn an orgastic sense; as regards sexual orgasm.orgiasticismWild, uncontrolled behaviour (especially sexual), like that of an orgy.orichalceousPertaining to, or resembling, orichalch; having a colour or lustre like that of brass.orientalisedsimple past and past participle of orientaliseorientalisesthird-person singular simple present indicative of orientaliseorientalismsplural of orientalismorientalistsplural of orientalistorientationsplural of orientationorientednessThe state or condition of being oriented; an orientation.orienteering(sports) The act of racing across unfamiliar place using a map and compass.originalnessThe state or condition of being original.originatress(archaic) A female originator.oriostomatid(zoology) Any extinct sea snail in the family Oriostomatidae.orismologist(rare, lexicography) One who can explain technical terms; a person who engages in orismology.ormeloxifene(pharmacology) A selective estrogen receptor modulator.ornamentallyIn an ornamental way.ornamentlessLacking ornamentationornithochoreA plant whose spores, seeds, or fruits are dispersed by birds.ornithochory(biology, ecology) The dispersal of seeds by birdsornithodiranAny birdlike reptile of the clade Ornithodira.ornithodorid(zoology) Any soft tick in the family Ornithodoridae, a synonym of the Argasidae.ornithogalum(botany) Any plant of the genus Ornithogalum.ornithogenicFormed by birds.ornithologer(rare) An ornithologist.ornithologicOf or relating to ornithology; ornithological.ornithomancyDivination by means of birds, especially from their behaviour, flight, vocalisations, etc.ornithomimid(zoology) Any of the family Ornithomimidae of dinosaurs.ornithomimus(paleontology) Any relatively small theropod dinosaur of the genus †Ornithomimus, the first genus of the ornithomimids to be described.ornithomorphA figure in ancient art resembling a bird.ornithophageAny organism that eats birds.ornithophagyThe condition of being ornithophagous.ornithophileA person who loves birds; a bird-lover.ornithophilypollination by birdsornithophobeOne who exhibits ornithophobia, the fear of birds.ornithopodanSynonym of ornithopod (“dinosaur of the clade Ornithopoda”).ornithoscopybirdwatchingorobranchialRelating to the mouth and the gillsorocutaneous(anatomy) Relating to both the mouth and skin, as for example (a) a rash or lesion affecting both the oral mucosa and the perioral skin or (b) a fistula connecting the oral cavity to the skin of the cheek.orodigestive(anatomy) Relating to the mouth and the digestive tract.orogenicallyIn terms of, or by means of, orogeny.orographicalAlternative form of orographic.orolaryngeal(anatomy) Relating to the mouth and the larynxorologicallyIn terms of orology.oromaxillaryRelating to the mouth and the maxilla.oromucosallyIn an oromucosal manneroropharyngesplural of oropharynxororotundity(rare) The quality of being orotund (in various senses); orotundity.orosensationA false sensation of taste obtained by stimulation of the tongue.orotemperateDescribing a temperate mountain climateorphenadrineAn anticholinergic drug of the ethanolamine antihistamine class, closely related to diphenhydramine, used to treat painful muscle spasm and some aspects of Parkinson's disease.orthoacetate(organic chemistry) Any orthoester, formally derived from acetic acid, of general formula CH₃C(OR)₃orthocentral(geometry) Relating to the orthocenter.orthocentric(geometry, of a tetrahedron) Having all three pairs of opposite edges perpendicular.orthocephalyThe condition of being orthocephalicorthoceratid(zoology) Any in the family Orthoceratidae of extinct cephalopods.orthoclastic(crystallography) Having cleavage planes at right angles, as in orthoclase.orthodiagramThe record made by an orthodiagraph.orthodontics(medicine) A specialty of dentistry concerned with correcting misalignment of teeth.orthodontistAn orthodontic dentist.orthodontureOrthodontics.orthodoxallyObsolete form of orthodoxly.orthodoxicalDated form of orthodox.orthodoxnessThe state or condition of being orthodox.orthodromicsorthodromic navigationorthoepisticRelating to orthoepists or to orthoepyorthoexciton(physics) An exciton whose spin is parallel to that of its holeorthoferrite(inorganic chemistry) Any of a class of chemical compounds with the general formula RFeO₃, where R is any rare earth element.orthofluvialDescribing the area, next to a river, that is frequently floodedorthoformate(organic chemistry) Any orthoester, formally derived from formic acid, of general formula HC(OR)₃orthogenesis(evolutionary theory, historical) The hypothesis that evolution tends toward a certain goal, at least at some scales.orthogeneticOf or pertaining to orthogenesis or orthogenetics.orthogenomicRelating to orthogenomicsorthognathicStraight-jawed.orthogonallyIn an orthogonal manner; perpendicularly; at right anglesorthographerSomeone who devises an orthography.orthographicOf a projection used in maps, architecture etc., in which the rays are parallel.orthoimageryorthoimages in general; their productionorthokinesisA form of kinesis in which the speed of movement of the individual is dependent upon the intensity of the stimulus.orthokinetic(physics) Describing any property related to the kinetic energy imparted by collisions with other bodiesortholattice(mathematics) An orthocomplemented lattice.orthologicalRelating to orthologyorthomodular(mathematics) Describing a lattice with the property that its every orthogonal pair is modular.orthomorphic(cartography) conformalorthonasallyIn an orthonasal mannerorthoneurousExhibiting or relating to orthoneury.orthonitrate(inorganic chemistry) The anion NO₄³⁻ or any salt containing this anionorthopaedics(British) Alternative spelling of orthopedics.orthopaedist(Commonwealth) Alternative spelling of orthopedist.orthopalinalMoved backwards and forwards in a straight lineorthopedical(American spelling) Alternative form of orthopaedical.orthopedistsplural of orthopedistorthophemismAn orthophemistic term, one that is neither euphemism nor dysphemism.orthophonistspeech therapistorthopracticRelating or conforming to orthopraxy.orthopteristAn entomologist who specialises in orthoptersorthopteroid(entomology) Any of the insects historically included in the order Orthoptera, including the cockroaches, earwigs, praying mantises, etc.orthopterous(zoology) Belonging to the Orthoptera.orthoquinone(organic chemistry) 1,2-benzoquinoneorthorectifyTo process an aerial photograph so as to geometrically correct it such that the scale of the photograph is uniform and it can be measured as a map is.orthorhombic(crystallography) Having three unequal axes at right angles.orthosilicic(chemistry) Of, relating to or derived from orthosilicic acid.orthosomatic(entomology) Having a straight bodyorthosomycin(organic chemistry) Any of a group of antibiotics that have orthoester linkages with a carbohydrate.orthostatism(uncommon) Synonym of orthostasis (“an upright standing position”).orthosterism(biology, of a receptor) The condition of being orthostericorthosurgeon(medicine, rare) An orthopedist or orthopedic surgeon.orthosurgery(medicine, rare) Orthopedics or orthopedic surgery.orthotactics(linguistics) The restrictions a language applies to the positions and patterns of graphemes in written words.orthoteliineAny moth of the subfamily OrthoteliinaeorthotonesisThe accentuation of a proclitic or enclitic.orthotopicalAlternative form of orthotopic.orthotriaenea sponge spicule that has three short rays projecting at right angles from a longer oneorthotrophicRelating to orthotrophyorthotropismThe property of being orthotropic or orthotropous.orthotropous(botany, of an ovule) Growing straight and having the micropyle at the apexorthovoltage(medicine) A voltage of about 300 to 500 kilovolts, when used in radiation therapy.oryctography(obsolete) The description of fossils.oryctologist(obsolete) Someone versed in oryctology.orysastrobinA particular fungicide.oryzastrobinA particular strobilurin fungicide.osarizawaite(mineralogy) A greenish-yellow mineral with the chemical formula PbCuAl₂(SO₄)₂(OH)₆, having rhombohedral crystals.oscheoplastyplastic surgery of the scrotumoscillationsplural of oscillationoscilloclast(pseudoscience, historical) A device that was supposed to diagnose cancer from tissue samples.oscillogramsplural of oscillogramoscillographAn instrument for measuring alternating or varying electric current in terms of current and voltage; an oscilloscope.oscillometer(physics, medicine) Any of several devices that measure oscillationsoscillometry(physics, medicine) The measurement of oscillationsoscillopathy(pathology) Any neurocognitive disorder characterised by oscillations in brain rhythmsoscilloscopeAn electronic measuring instrument that creates a visible two-dimensional graph, on a screen, of one or more continuously varying voltages or currents.oscilloscopyThe use of the oscilloscope.osetogenesisMisspelling of osteogenesis.osilodrostatA drug for the treatment of Cushing's disease.osmanthuside(organic chemistry) Any of a group of phenolic glycosides present in Osmanthus fragrans.osmification(cytology) staining or fixating with osmic acid solutionosmoadaptionAlternative form of osmoadaptation.osmoadaptiveThat can adapt to changes in osmotic pressureosmodiureticAn osmotic diureticosmoeffector(physiology) Any substance that regulates osmotic pressure (in tissues)osmolaritiesplural of osmolarityosmometricalAlternative form of osmometric.osmoreceptor(biology) A sensory receptor, primarily found in the hypothalamus of most homeothermic organisms, that detects changes in osmotic pressureosmorecovery(physiology) The recovery of osmotic balance after exerciseosmoregulantSynonym of osmoregulator.osmoregulateTo regulate osmotic pressure (via osmoregulation, in order to maintain a certain water content, concentration of electrolytes, pH, etc).osmoresponseA response to a change in osmotic pressureosmospecificspecific to a certain (range of) osmotic pressure(s)osmostressorAnything that causes osmostressosmotolerantTolerant of high osmotic pressure.osmotoxicityThe deleterious effect of injection of a highly concentrated solution (typically, a contrast medium)osmundaceous(botany) Belonging to the family Osmundaceae of ferns.ossiculotomySurgical incision into the ossicles of the ear.ossificationThe normal process by which bone is formed.ostechondralAlternative form of osteochondral.osteichthianMisspelling of osteichthyan.osteichthyanA bony fish of the class Osteichthyes.ostentaciousMisspelling of ostentatious.ostentatiousOf ostentation.osteoactivin(biochemistry) A glycoprotein that regulates osteoblast differentiation and functionosteoadherinSynonym of osteomodulin.osteoblasticOf or pertaining to an osteoblastosteoclastic(pathology) Of or pertaining to an osteoclastosteocranial(anatomy) Relating to the osteocraniumosteocranium(anatomy) The bony cranium, as distinguished from the cartilaginous cranium.osteodentine(anatomy) A hard bony substance that is sometimes deposited within the pulp cavity of teeth of certain animals.osteodonticsA combination of osteopathy and dentistryosteofascial(anatomy) Relating to bone and fascia.osteofibroma(medicine) Any tissue mass comprising bony and fibrous tissues, not necessarily specific to just a single disease entity in modern histopathology classifications but correlated especially with osteofibrous dysplasia.osteofibrous(pathology, of tissue) Of combined osseous and fibrous type (within bone or within a tumor elsewhere).osteogenesesplural of osteogenesisosteogenesis(physiology) The formation and development of bone.osteogenetic(physiology) Connected with osteogenesis, or the formation of bone.osteoglossid(ichthyology) Any fish in the family Osteoglossidae, the arowanas.osteoglossinAny fish of the genus Osteoglossum.osteographerOne who studies osteography.osteoimplantAn implant in a boneosteoinducedFormed via osteoinductionosteolepidid(zoology) Any extinct sarcopterygian in the superorder Osteolepididaosteolineage(cytology) A lineage of bone cellsosteologicalOf or relating to osteology.osteologistsplural of osteologistosteomalacia(medicine) A softening of adult bones due to inadequate mineralization; the adult equivalent of ricketsosteomalacicOf or pertaining to osteomalaciaosteometricsplural of osteometricosteomimeticThat mimics some quality of boneosteomimicryThe expression of genes normally expressed by bone cells in another tissue (typically cancerous)osteomodulinA certain human gene.osteophagousThat eats bones.osteoplastic(surgery) Of, or relating to osteoplasty.osteopoiesisThe creation and development of bone cellsosteoporiticRelating to osteoporosisosteoporosis(pathology) A disease, occurring especially in women following menopause, in which the bones become extremely porous and are subject to fracture.osteoporoticRelating to osteoporosis.osteorrhaphy(rare, medicine) Synonym of osteosuture.osteosarcoma(oncology) A type of cancer of the bone.osteospermumAny of the genus Osteospermum of subshrubs.osteostracanAny extinct fish of the class OsteostraciosteotomisedAlternative form of osteotomized.osteotomized(surgery) Modified by osteotomyosteotrophicPromoting bone growth.osteotropismThe condition of being osteotropicostraciiformCharacteristic of boxfish of the family OstraciidaeostracisableAlternative form of ostracizable.ostracitoxin(organic chemistry) A toxin produced by the boxfish.ostracizable(rare) Capable of being ostracized.ostracodermsplural of ostracodermostracultureThe commercial production of oysters.otacousticon(now rare) An instrument to aid hearing, such as an ear trumpet or hearing aid.otelixizumabA monoclonal antibody, being developed for the treatment of type 1 diabetes and other autoimmune diseases.otherisationAlternative form of otherization.otherizationThe process of otherizing.otherlandishPertaining to other lands; foreign, nondomestic.otherwhereas(obsolete) Elsewhere.otherwhither(obsolete or archaic) Elsewhither.otherworldlyOf, concerned with, or preoccupied with a world different from the tangible world, especially a fantasy, imaginary, or mystical world.otoacariasisacariasis of the earotoacousticsThe science studying otoacoustic sounds.otoendoscopeAn endoscope used to examine the middle earotoendoscopyendoscopy of the external earotolaryngealRelating to the ear and the larynxotologicallyIn an otological manner.otoneurology(medicine) The study of neurological aspects of hearing and the ear.otooccipitalAlternative spelling of otoccipital.otopathologyThe study of diseases of the earotorhinologyThe study of (diseases of) the ear and noseotosclerosis(pathology) Sclerosis of the tissues of the labyrinth and middle ear.otoscleroticRelating to otosclerosis.ototoxicallyIn an ototoxic mannerourangoutangRare form of orangutan.ouranographyAlternative form of uranography.ouranophobiaFear of heaven.outadvertise(transitive) To advertise more or better than.outbranchingpresent participle and gerund of outbranchoutbreathingpresent participle and gerund of outbreatheoutbreedingsplural of outbreedingoutbuildingsplural of outbuildingoutcalculate(transitive) To surpass in calculation; to calculate better or faster than.outcroppingsplural of outcroppingoutdatednessThe quality of being outdated.outdentationSynonym of dedentation (“reversal of indentation”).outdistancedsimple past and past participle of outdistanceoutdoorsnessThe quality of being outdoors.outergarmentAlternative form of outer garment.outfangthief(historical, law, rare, countable) A thief so captured and tried.outfieldsman(cricket) A player in the outfield.outformation(neologism) Something that is sent out or broadcast from the source that formed it.outgeneraledsimple past and past participle of outgeneraloutgoingnessThe state or condition of being outgoing; gregariousness, extroversion.outinfluence(transitive) To surpass in influencing; to have a greater influence than.outlandisher(obsolete) Foreigner; outlander.outlandishlyIn an outlandish manner.outlyingness(statistics, of a data point, etc.) The measure, degree or quality of being an outlier.outmaneuversthird-person singular simple present indicative of outmaneuveroutmanoeuverAlternative form of outmanoeuvre.outmanoeuvre(British spelling, transitive) To perform manoeuvres or movements more successfully or better than; to surpass or get the advantage of in manoeuvring; to outgeneral.outmigratingpresent participle and gerund of outmigrateoutmigrationSynonym of emigration.outmodednessThe condition of being outmoded.outnumberingpresent participle and gerund of outnumberoutpensionerOne who is granted an outpension.outperformedsimple past and past participle of outperformoutperformerOne who outperforms.outplacementthe process of helping to find new employment for redundant workers, especially executivesoutpocketingThe growth of a surface so as to form a cavity (sac or pocket); the cavity so formedoutrageouslyIn an outrageous manner; to an outrageous degree.outrecuidant(archaic) Presumptuous, arrogant, conceited.outreproduce(transitive) To surpass in reproducing; to outbreed.outrightnessQuality of being outright.outroduction(rare) The closing remarks made at the end of a book, story, performance, etc.outroductory(rare) Related or referring to an outro or closing section.outsegregate(transitive) To promote or follow a more segregationist policy than.outsiderhoodThe state or condition of being an outsider.outsidernessThe state or condition of being an outsider.outspreadingpresent participle and gerund of outspreadoutstandingsoutstanding amounts; unpaid debtsoutstatistic(transitive) To look better, or more impressive, when described using statistics.outstretchedExtended or stretched out.outstretcher(rare) One who or that which outstretches.outstrippingpresent participle and gerund of outstripoutwanderingpresent participle and gerund of outwanderovalentarianAny fish of the clade Ovalentaria, in the clade Percomorpha.ovalocytosiselliptocytosisovalocytoticHaving, or relating to, ovalocytosis.ovariocyesis(medicine, archaic, uncommon) Synonym of oocyesis.ovariotomiesplural of ovariotomyovariotomist(surgery, now historical) Someone who performs a ovariotomy.ovariotomize(transitive) To perform an ovariotomy upon.overabsorbedsimple past and past participle of overabsorboverabstractExcessively abstract.overabundantexcessively abundant.overaccuracyExcessive accuracy.overaccurateExcessively accurate.overachieverOne who overachieves; one who has too much success.overacquiredacquired to excessoveractivateTo activate excessivelyoveractivityExcessive activityoveractuatedExcessively actuated (such as to cause damage).overaddictedExcessively addicted.overadditiveMore than additiveoveradjustedHaving been adjusted too much.overaerationExcessive aeration.overallocate(transitive) To allocate too much of.overambitionThe quality of being overambitious.overamperageSynonym of overcurrent.overanalysisAn analysis carried too far; the act or process of overanalyzing.overannotateTo add too many annotations.overappraise(transitive) To appraise at too high a value.overassessesthird-person singular simple present indicative of overassessoverattachedExcessively attached.overbalancedsimple past and past participle of overbalanceoverbalancesthird-person singular simple present indicative of overbalanceoverbattered(cooking) Coated in too much batter.overbearance(rare or obsolete) Overbearing behaviour; arrogance; imperiousness.overbeetlingProtruding, jutting, overhanging.overbitterlyin an overbitter manneroverboardingpresent participle and gerund of overboardoverboastfulExcessively boastful.overboldnessThe state or fact of being too bold; audacity.overboweringoverarching so as to form a bower or shelteroverbranchedExcessively branchedoverbreathedBreathed too much, or by too many people.overbridgingForming a bridge over something else; overarching.overbrimmingpresent participle and gerund of overbrimoverbuildingpresent participle and gerund of overbuildoverbuoyancyExcessive buoyancy.overburdenedExcessively burdenedovercapacityA capacity for the production of a commodity or product that is in excess of what is needed.overcaptiousExcessively captious.overcarelessExcessively careless.overcarriageThe transportation of cargo beyond its intended destination.overcastnessThe quality of the weather being overcast.overcasuallyIn an overcasual manner.overcategory(category theory) Any functor into a specified base category.overcautiousExcessively cautious.overcerebralExcessively cerebral.overchangingpresent participle and gerund of overchangeoverchargingThe act or process of charging excessivelyovercheerfulExcessively cheerful.overchildishExcessively childish.overchurchedHaving too many churches.overcitationExcessive citation.overcivilityExcessive civility.overcivilize(transitive) To civilize excessively.overclassify(transitive) To classify excessivelyoverclockingpresent participle and gerund of overclockoverclothingthe act or process of enwrapping (oneself) in clothingovercoatingsplural of overcoatingovercoatlessWithout an overcoat.overcoloringpresent participle and gerund of overcolorovercolouredsimple past and past participle of overcolourovercomeableable to be overcome; surmountable.overcominglySo as to overcome.overcommitalAlternative spelling of overcommittal.overcomplete(mathematics) Describing a frame (in linear algebra) having a set of functions more than a basisovercomposed(film) Having undergone too much composition or arrangement; excessively posed, to the point of seeming artificial.overcompress(transitive) To compress too much.overconsumerOne who consumes too much.overcorrectsthird-person singular simple present indicative of overcorrectovercossetedExcessively cosseted.overcoupling(electrical engineering) The act of coupling two tuned transformers so as to create a broader bandwidth.overcourtesyExcessive courtesy.overcoverageExcessive coverageovercovetousExcessively covetous.overcreativeExcessively creative.overcriticalExcessively critical.overcroppingpresent participle and gerund of overcropovercrossingpresent participle and gerund of overcrossovercrowdingpresent participle and gerund of overcrowdoverculturalOf or pertaining to an overculture.overculturedExcessively cultured.overcutenessThe quality of being overcute; excessive cuteness.overdaringlyIn an overdaring manner.overdeclareddeclared to be greater than is the caseoverdecorateTo decorate or embellish to an excessive degreeoverdefendedExcessively defended.overdelicacyExcessive delicacy.overdelicateExcessively delicate.overdescribeTo provide an overly detailed description.overdesignedHaving undergone excessive design, leading to complicatedness or an unnecessary degree of capability and durability.overdesirousExcessively desirous.overdetailedExcessively detailed.overdevelopsthird-person singular simple present indicative of overdevelopoverdevotionExcessive devotion.overdiagnose(medicine) To diagnose something more often than it actually occurs.overdilationexcessive dilationoverdilutionExcessive dilution.overdirectedsimple past and past participle of overdirectoverdiscount(transitive) To discount too much.overdisperse(transitive) To disperse too much or too far.overdiuresis(medicine) Excessive diuresis, typically causing inappropriate polyuria and thus potentially dehydration and electrolyte imbalances.overdivisionThe act or result of overdividing.overdocument(transitive) To document something in greater detail than necessary.overdogmaticExcessively dogmatic.overdominantExcessively dominant.overdominateTo dominate excessively.overdonenessQuality of being overdone.overdraftingThe process of extracting groundwater beyond the safe yield or equilibrium yield of the aquifer.overdrainageexcessive drainageoverdramaticDramatic to excess.overdressingpresent participle and gerund of overdressovereasinessExcessive easiness.overeducatedHaving received too much educationovereffusiveExcessively effusive.overeleganceExcessive elegance.overelongateTo elongate excessivelyoverempathicExcessively empathic.overemphasisExcessive emphasis.overemphaticExcessively emphatic, particularly in musical or theatrical interpretationoveremployedsimple past and past participle of overemployoverenamoredExcessively enamored; too much in love.overencumber(transitive) To encumber excessively.overengineer(transitive) To render something more complicated than necessary; often implying that the complexity was added intentionally.overenrichedExcessively enrichedoverenrolledFor which too many people have enrolled.overentitledFeeling or acting as though one is entitled to more than one really is; overly demanding or grabby.overeruption(dentistry) The physiological movement of a tooth lacking an opposing partner in the dental occlusion.overestimateTo judge or calculate too highly.overevaluate(transitive) To evaluate and rank too highly; overvalue.overexaminedSubjected to too much examination, or too many academic or medical examinations.overexerciseTo exercise to an excessive degree.overexertingpresent participle and gerund of overexertoverexertionexcessive exertion; so much exertion that discomfort or injury resultsoverexplicitExcessively explicit.overexploredExcessively explored or investigated.overexposureExcessive exposure.overextendedsimple past and past participle of overextendoverextenderOne who overextends.overfamiliarCommon or repeated to the point of being unnoticed or annoying.overfancifulExcessively fanciful.overfatiguedsimple past and past participle of overfatigueoverfatiguesthird-person singular simple present indicative of overfatigueoverfeaturedsimple past and past participle of overfeatureoverfeminineExcessively feminine.overfeminize(transitive) To feminize excessively.overfinenessexcessive finenessoverfinishedOf animals reared for meat: obese; undesirably fat.overfixationExcessive fixationoverflourish(obsolete) To make excessive display or flourish of.overflowableCapable of being overflowed.overfondnessExcessive fondness.overforcefulWith excessive force.overforestedToo densely forested.overfragrantExcessively fragrant.overfrequentExcessively frequent.overfriendlyExcessively friendly.overfrighten(transitive) To frighten excessively.overfruitfulExcessively fruitful.overfullnessThe state of being excessively or abnormally full.overfunction(intransitive) To function excessively.overgenerate(natural language processing) To assign meaning to incorrect sentences.overgenerousgenerous to an excessive degreeovergloriousExcessively glorious.overgraciousExcessively gracious.overgraspingExcessively grasping.overgrassing(dated) Excessive grazing by livestock.overgratefulExcessively grateful.overgreedilyWith excessive greed.overgrievousExcessively grievous.overhallowedsimple past and past participle of overhallowoverhandicap(transitive) To handicap excessively.overhardnessExcessive hardness.overhastenedBrought on too hastily; rushed.overhaulableCapable of being overhauled.overheartilyIn an excessively hearty manner.overheatedlyIn an overheated manner; with undue heat.overheighten(transitive) To heighten excessively.overhemisectTo divide beyond the midlineoverhonestlyWith excessive honesty.overhoveringHovering above.overhumaniseAlternative spelling of overhumanize.overhumanize(transitive) To overly humanize a nonhuman or subhuman entity.overidealismExcessive idealism.overidealize(transitive) To idealize to too great an extent.overidentify(intransitive) To identify too much (with another person or thing).overimmunizeTo provide with more immunizations than is necessary.overimprovedExcessively improvedoverinclinedOverly inclined.overindebtedToo deeply in debt.overindulgedsimple past and past participle of overindulgeoverindulgerOne who overindulges.overindulgesthird-person singular simple present indicative of overindulgeoverinflatedsimple past and past participle of overinflateoverinfusionExcessive infusionoverinitiateTo initiate excessivelyoverinsolentExcessively insolent.overinstructTo instruct excessively.overinterestToo much or excessive interest.overintimateExcessively intimate.overinvestedsimple past and past participle of overinvestoverinvestorOne who invests too much.overinvolvedExcessively involved.overirrigate(transitive) To irrigate excessively.overissuanceExcessive issuance.overjubilantExcessively jubilant.overkeennessExcessive keenness.overkindnessExcessive kindness.overlabouredsimple past and past participle of overlabouroverlaminateAn outer layer of lamination.overlappableCapable of being made to overlap.overlappingsplural of overlappingoverlavishlyIn a way that is overlavish.overlearningpresent participle and gerund of overlearnoverleisuredExcessively leisured.overlengthen(transitive) To lengthen too much.overleniencyExcessive leniency.overleverageExcessive leverage.overlicensedLicensed too much or too widely.overliteraryExcessively literary.overlitigateTo litigate excessively.overloadable(programming) That can be overloaded.overlookableThat can be overlooked; ignorable.overlordshipThe position or quality of being an overlord.overloudnessQuality of being overloud.overluminous(astronomy) More luminous than an equivalent star of the main sequenceoverlusciousExcessively luscious.overmajorityA large majority; more than a majority.overmanneredExcessively mannered.overmasteredsimple past and past participle of overmasterovermatchingpresent participle and gerund of overmatchovermaturityThe quality of being overmature.overmeddlingExcessive interference.overmedicateTo medicate excessivelyovermeeknessExcessive meekness.overmercifulExcessively merciful.overminutelyExcessively minutely; in too much fine detail.overmoderate(ambitransitive) To moderate excessively.overmodestlyWith excessive modesty.overmodulate(transitive) To modulate too much.overmoistureAn excess of moisture.overmortgageTo take out a mortgage for too much money.overmouldingpresent participle and gerund of overmouldovermournfulExcessively mournful.overmuchness(dated) The quality or state of being in excess; superabundance.overmultiply(intransitive) To multiply too muchovermuscularSynonym of overmuscled.overneatnessExcessive neatness.overnegation(Buddhism) Excessive negation.overnicenessThe quality of being overnice.overnightersplural of overnighterovernightingpresent participle and gerund of overnightovernitratedExcessively nitratedovernumberedsimple past and past participle of overnumberoverobedientExcessively obedient.overoccupiedOverly busy or engrossed.overoptimismExcessive optimism.overoptimistAn excessively optimistic person.overoptimizeTo optimize excessively.overorganize(transitive) To organize in too much detail.overornament(transitive) To ornament excessively.overoxidizedExcessively oxidizedoverpackagedsimple past and past participle of overpackageoverpaintingpresent participle and gerund of overpaintoverparentedExcessively spoiled, restricted, etc. by one's parents; given insufficient freedom as a child.overpaymentsplural of overpaymentoverpedanticExcessively pedantic.overpenaliseAlternative form of overpenalize.overpenalizeTo penalize excessivelyoverperceive(transitive) To perceive to a greater degree than actually exists.overpersuadeTo win someone over through persuasion; to convince (someone) to do something against their own judgement or wishes.overplanningExcessive planningoverplottingpresent participle and gerund of overplotoverpollutedHaving too much pollution.overpopulateTo fill with too many individuals; to exceed the capacity of a region to contain the population.overpopulousExcessively populous.overpositiveExcessively positive.overpowerfulExcessively powerful.overpoweringpresent participle and gerund of overpoweroverpraisingpresent participle and gerund of overpraiseoverpreciousExcessively precious; contrived, artificial.overpreparedsimple past and past participle of overprepareoverpresence(rare) Excessive presence.overpressureexcess or markedly elevated pressure, especially a transient high pressure due to a shock waveoverprintingpresent participle and gerund of overprintoverproducerOne who overproduces.overproducesthird-person singular simple present indicative of overproduceoverprolificExcessively prolific.overpromiserOne who overpromises.overpronatorOne who overpronates.overpurchaseTo buy too much of something.overquantify(transitive) To quantify too much; to interpret with too great a focus on numbers, quotas, etc.overquantityAn excessive quantity; surplus.overranknessExcessive rankness.overrashnessExcessive rashness.overrationalExcessively rational.overreachersplural of overreacheroverreachingThat overreaches (all senses).overreactingpresent participle and gerund of overreactoverreactionA reaction that is excessive.overreactiveToo reactive; tending to overreact.overrecoveryThe recovery of more money than was actually owed.overregardedRegarded too highly.overregulateTo regulate to a greater degree than appropriate.overrelianceExcessive reliance.overreporterOne who overreports something.overresoluteExcessively resolute.overresponseexcessive responseoverrestrainTo restrain too much.overrestrict(transitive) To restrict excessively.overrewardedExcessively rewardedoverrichnessQuality of being overrich.overrideableAlternative form of overridable.overridinglyIn an overriding manner; to the exclusion of other factors or concerns.overrigidityexcessive rigidityoverrigorousExcessively rigorous.overripenessThe state or condition of being overripe.overromanticExcessively romantic.overrotationexcessive rotationoverrulinglySo as to overrule.oversamplingpresent participle and gerund of oversampleoversanguineToo sanguine; overconfident, too disposed to hopes of success.oversaturateTo saturate to excess.overschedule(transitive) To overfill the schedule of.overschooledsimple past and past participle of overschooloverscribble(transitive) To scribble over.oversedationExcessive sedationoverseershipThe role or office of overseer.overselectedExcessively selectedoversensibleExcessively sensible.overseverityExcessive severity.overshadowedpast participle of overshadowovershadowerSomeone or something that overshadows.overshepherdA head shepherd.overshootingpresent participle and gerund of overshootoversimplifyTo explain or present something in a way that excludes important information for the sake of brevity, or of making the explanation or presentation easy to understand.oversleepingpresent participle and gerund of oversleepoverslownessExcessive slowness.oversmoothedExcessively smoothedoversoftnessExcessive softness.oversolemnlyIn an oversolemn manner.oversoothingExcessively soothing.overspaciousExcessively spacious.overspangled(poetic) Covered as if with spangles.overspecificToo specific; with too much detail.overspeedilyWith excessive speed.overspeedingPresent participle and gerund of overspeed.overspendingpresent participle and gerund of overspendoverspinningExcessive spinningoversprinkle(transitive) To sprinkle over.oversqueezedExcessively squeezedoverstanding(uncommon) A complete or intuitive comprehension of something; a full understanding of something.oversteeringpresent participle and gerund of oversteeroversteppingpresent participle and gerund of overstepoverstockingA stocking intended to be worn over another stocking.overstrainedsimple past and past participle of overstrainoverstratifyTo stratify excessively.overstrengthHaving personnel in excess of that prescribed by a table of organization.overstressedExcessively stressed.overstressesthird-person singular simple present indicative of overstressoverstrictlyExcessively strictly.overstriddenpast participle of overstrideoverstridentExcessively strident.overstridingpresent participle and gerund of overstrideoverstrikingpresent participle and gerund of overstrikeoverstronglyWith excessive strength.overstuffingpresent participle and gerund of overstuffoverstylisedNon-Oxford British English standard spelling of overstylized.overstylizedOverly (excessively) stylized.oversubtletyExcessive subtlety.oversulfatedOverly sulfated.oversupinateTo supinate to an excessive degree.oversuppliedsimple past and past participle of oversupplyoversurenessThe state of being oversureoversweepingpresent participle and gerund of oversweepoverswellingpresent participle and gerund of overswellovertakeableAlternative form of overtakable.overtalentedHaving excessive talent.overtattooedHaving too many tattoos.overtautnessExcessive tautness.overtaxationexcessive taxationovertenderlyIn an overtender manner.overtheorize(intransitive) To theorize too much.overthinkingpresent participle and gerund of overthinkoverthrowingpresent participle and gerund of overthrowoverthwartly(obsolete) In an overthwart manner; going across.overtimidityExcessive timidity.overtimorousExcessively timorous.overtoweringThat towers above or over; that overtowers.overtrainingpresent participle and gerund of overtrainovertroubledExcessively troubled.overtrousersTrousers to be worn over a similar inner garment.overtrustfulExcessively trustful.overtrustingExcessively trusting.overtruthfulExcessively truthful.overturnableCapable of being, or liable to be, overturned or subverted.overutilizerOne who overutilizes.overvaluableExcessively valuable.overvehementExcessively vehement.overviewableAble to be overviewed.overvigorousExcessively vigorous.overvoltagesplural of overvoltageoverweaponedHaving too many weapons; overarmed.overweighingpresent participle and gerund of overweighoverweightedsimple past and past participle of overweightoverwhelmingpresent participle and gerund of overwhelmoverwinteredsimple past and past participle of overwinteroverwintererOne who overwinters.overwitheredExcessively withered.overwithhold(finance) To withhold an excess amount of tax for an employee etc., the excess being refunded at a later stage.overwrappingpresent participle and gerund of overwrapoverwritableCapable of being overwritten.overyieldingThe amount a species yields, when grown with other species compared to yield in a monoculture.overyouthfulExcessively youthful.oviductosome(biology) An oviductal extracellular vesicleovoinhibitorAny of a class trypsin inhibitors found in hen's eggsovovitellineRelating to egg yolkovulationaryRelating to ovulation.oxacarbeniumAlternative form of oxocarbenium.oxacillinase(biochemistry) Any of the OXA group of beta-lactamases, found mainly in Acinetobacter species.oxadiazepine(organic chemistry) Any of several isomeric seven-membered, unsaturated heterocycles containing four carbon atoms, two nitrogen atoms, one oxygen atoms and three double bondsoxadiazinane(organic chemistry) A six-membered saturated heterocycle containing three carbon atoms, two nitrogen atoms and one oxygen atom; any derivative of this compoundoxadiazolone(organic chemistry) A derivative of oxadiazole having a carbonyl group adjacent to the oxygen atomoxalethyline(organic chemistry) A poisonous nitrogenous base, C₆H₁₀N₂, obtained indirectly from oxamide as a thick clear oil with a strong odour and a physiological action resembling that of atropine.oxalidaceous(botany) Of or relating to the family Oxalidaceae of wood sorrel and its close relatives.oxaloacetate(organic chemistry) Any salt or ester of oxaloacetic acid.oxalotrophicRelating to oxalotrophyoxamethylane(obsolete, chemistry) methyl oxamateoxaphosphine(organic chemistry) The six-membered unsaturated heterocycle containing four carbon atoms, one oxygen atom, one phosphorus atom and two double bondsoxaphosphole(organic chemistry) The unsaturated five-membered heterocycle having three carbon atoms, one oxygen atom, one phosphorus atom and two double bonds.oxaprotilineA psychoactive drug and research chemical of the tetracyclic chemical class.oxatricyclic(organic chemistry) Relating to an oxatricycleoxazolomycinAny of a class of antibiotics derived from Streptomyces bacteria.oxibendazoleA benzimidazole anthelminthic drug used in horses and some domestic pets.oxibuprocainMisspelling of oxybuprocaine.oxidocyclase(organic chemistry) Any of a class of terpenophenol present in leaves of Rhododendron and similar plantsoxiluciferinMisspelling of oxyluciferin.oxireductaseAlternative form of oxidoreductase.oxoaporphine(organic chemistry) Any oxo derivative of an aporphineoxoazetidine(organic chemistry) A saturated, four-membered heterocycle containing two carbon atoms, one oxygen atom and one nitrogen atom; any derivative of this compoundoxobutanoate(organic chemistry) Any derivative of a butanoate in which a methylene group has been replaced by a carbonyl groupoxocarbazate(organic chemistry) A derivative of a carbazate in which a methylene group has been replaced by a carbonyloxocarbenium(organic chemistry) Any canonical form of a carbocation having the positive charge on an oxygen atomoxoglutarate(organic chemistry) Any salt or ester of oxoglutaric acid.oxohydroxide(inorganic chemistry) Alternative form of oxyhydroxide.oxomanganese(inorganic chemistry) An oxide of manganese, "MnO", that forms green crystalsoxometallate(chemistry) Any metallate containing oxygen as ligandoxononanoate(organic chemistry, biochemistry) Any salt or ester of the keto acid derived from nonanoic acid, some of which have biochemical functionsoxophilicity(chemistry) A tendency to form oxides, typically by abstraction of oxygen from organic compounds.oxoprolinase(biochemistry) An enzyme that catalyses the hydrolysis of oxoprolineoxopropanoic(organic chemistry) Of or relating to a compound containing a ketone group attached to a three-carbon chain with a carboxylic acid functional group.oxotremorine(medicine) A particular parasympathomimetic drugoxpoconazoleA particular fungicide.oxyacanthine(organic chemistry) berbineoxyacetylene(organic chemistry) A mixture of oxygen and acetylene, which burns at a high temperature and is used for cutting and welding metals.oxyamination(organic chemistry) Any reaction in which an oxygen atom (or, typically, a hydroxide group) and an amino group is added across a double bondoxyarylation(organic chemistry) Any addition reaction in which an oxygen atom and an aryl group are added across a double bond or triple bondoxycarbenium(organic chemistry) Any cation of general formula R=O⁺-Roxycarbonate(chemistry) Any substance which is both an oxide and a carbonateoxycelluloseoxidized celluloseoxycephaliesplural of oxycephalyoxycephalismSynonym of oxycephaly.oxychlordaneA metabolite of chlordane.oxychrysazin(organic chemistry) 1,2,8-trihydroxyanthraquinoneoxyclozanideA salicylanilide anthelmintic used in the treatment and control of Fascioliasis in ruminants.oxyconformer(physiology) An organism that displays oxyconformity.oxycorticoidAny corticoid that has a carbonyl or hydroxy groupoxygenizable(chemistry, archaic) oxidizableoxygenolytic(organic chemistry) That breaks a bond (and, typically, opens a ring) via oxidationoxyguanidine(organic chemistry) The amide O=C(NH₂)₂ formally derived from guanidine by replacing an >NH group with one of >Ooxyhydroxide(inorganic chemistry) Any mixed oxide and hydroxideoxylipidomic(biochemistry) Relating to oxylipidomicsoxyluciferin(biochemistry) The luminescent product of the oxidation of luciferin by luciferaseoxymesterone(pharmacology) An anabolic steroid.oxymetholone(pharmacology) A synthetic anabolic steroid developed in 1960, used to treat osteoporosis and anaemia and to stimulate muscle growth in undernourished or underdeveloped patients.oxymethylene(chemistry) Formic aldehyde, regarded as a methylene derivative.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 oxyneolignaneoxyquinoline(organic chemistry) Hydroxy quinoline; a phenol derivative of quinoline.oxyregulator(biology) Any organism that can achieve oxyregulationoxyrhynchousHaving a pointed snout.oxysulphuret(chemistry, obsolete) oxysulfideoxytelluride(inorganic chemistry) a mixed oxide and tellurideoysterplantsplural of oysterplantoystershellsplural of oystershellozonetherapyAlternative form of ozone therapy.ozonosphericOf or pertaining to the ozonosphere.ozoralizumabA monoclonal antibody for the treatment of inflammatory diseases
Use These Words
Open any word for its full definition, examples, synonyms, antonyms, and related vocabulary. Every item is an existing dictionary entry; phrases, hyphenated terms, and malformed headwords are excluded.