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objectifiableThat can be objectified.objectionableArousing disapproval; worthy of objection; offensive.obtuanhydride(lichenolgy, biochemistry) A lichen-derived cyclic acid anhydride diterpene with IUPAC name (7aS,11aS)-2-hydroxy-8,8,11a-trimethyl-3-propan-2-yl-7a,9,10,11-tetrahydrobenzo[d][2]benzoxepine-5,7-dioneobtusaquinone(organic chemistry) The quinone methide (4E)-2-hydroxy-5-methoxy-4-[(E)-3-phenylprop-2-enylidene]cyclohexa-2,5-dien-1-one present in Dalbergia retusaobtusifolione(organic chemistry) A triterpenoid ketosteroid related to obtusifoliolobtusilactone(organic chemistry) Any of a group of unsaturated aliphatic cytotoxic lactones present in Lindera obtusilobaoccidentaliseAlternative form of occidentalize.occidentalize(transitive) To convert or adapt to Western culture.octaazacubaneA theoretical molecule composed of eight (8) nitrogen atoms only, in a cubic configuration, with each nitrogen (N) atom being a vertex on the cube, and bonding to three other nitrogens at the nearest three other vertexes. This is theorized to be the high explosive with the highest velocity, the most explosive non-nuclear explosive. It is an allotrope of nitrogen, and an analogue of the organic molecule cubane; and an isomer of octanitrogen (N₈).octacarbonate(chemistry) Any compound containing eight carbonate groups in each molecule or unit celloctacosanoate(organic chemistry) Any salt or ester of octacosanoic acidoctacosenoate(organic chemistry) Any salt or ester of an octacosenoic acidoctadecanoate(organic chemistry) Any salt or ester of octadecanoic acidoctadecenoate(organic chemistry) Any salt or ester of octadecenoic acid; oleate.octaglucosideAny glucoside that has eight glucose unitsoctaglutamate(organic chemistry) Any compound that has eight glutamate groups or anionsoctahistidine(especially in combination) polyhistidine that has eight monomersoctamanganese(chemistry, in combination) Eight manganese atoms or cations in a molecule (Mn₈)octamethylene(organic chemistry, especially in combination) Eight methylene groups in a molecule (typically in a row, with substituents or functional groups at each end)octanaldehyde(organic chemistry) Synonym of octanal.octantimonide(chemistry, in combination) Eight antimonide ions in a molecule (Sb₈)octarticulateHaving eight joints or articulationsoctillionaireSomebody whose wealth is at least one octillion (10²⁷) currency units.octobrachiateHaving eight brachia, arms, or rays.octocorallineOf or relating to the octocorals.octonaphthene(organic chemistry) A colourless liquid hydrocarbon, 1,3 dimethylcyclohexane, occurring in petroleum.octylaldehyde(organic chemistry) Synonym of octanal (especially n-octanal)odontomachineRelating to trap-jaw ants of the genus OdontomachusodorotriosideA particular steroid glycoside.oesophagocele(medicine) A hernia of the mucous membrane of the oesophagus through its walls.ogdensburgite(mineralogy) An orthorhombic-dipyramidal mineral containing arsenic, calcium, hydrogen, iron, manganese, oxygen, and zinc.oleomargarine(dated) Synonym of margarine.oligoalginateAn oligomeric form of alginate (alginic acid)oligoarginine(biochemistry) A relatively short polyarginine, especially one used to enhance cellular delivery of a drugoligodenylateMisspelling of oligoadenylate.oligoethylene(organic chemistry, especially in combination) Several ethylene groups in a molecule (typically in a row, but separated from each other by an atom such as oxygen)oligofluorene(organic chemistry) Any of a class of aromatic polycyclic hydrocarbons consisting of several fluorene units attached end to end.oligofructose(biochemistry) Any oligosaccharide composed of fructose residues.oligoribosomeA short polyribosomeoligorotaxane(organic chemistry) Any compound having the form of several rotaxane moietiesoligosequenceA sequence of several things, especially an oligonucleotideoligosiderite(mineralogy) A meteorite characterised by a small amount of metallic iron.oligosiloxane(organic chemistry) Any polysiloxane having a relatively small number of -Si-O- groupsoligostilbene(organic chemistry) Any polystilbene with a relatively low number of stilbene units.oligosulphideAlternative form of oligosulfide.oligosyllableAny oligosyllabic wordomaveloxolone(pharmacology) A synthetic oleanane.omnicarnivore(biology) An animal that eats many types of other animalomniherbivore(biology) An animal that eats many types of plant.omnirelevanceThe quality of being omnirelevant.omnisentience(religion) Sensory awareness of all things.oocytectomiseTo carry out an oocytectomyophidianosideA particular steroid glycoside.ophiomorphite(paleontology, obsolete) An ammonite.opisthocomine(zoology, ornithology) Of or pertaining to birds of the family Opisthocomidae, which is represented by the sole extant genus Opisthocomus and species Opisthocomus hoazin (hoazin).opisthogyrateThat curves toward the posterioropisthomeriteThe posterior gonopods of a millipede of the infraclass HelminthomorphaopportunivoreA person who subsists on still-edible food that has been or was going to be discarded.opthalmoscopeMisspelling of ophthalmoscope.optochemokineA chemokine that is activated by lightoptoelectrodeAn optoelectric electrodeorangutanlikeResembling an orangutanorchiectomize(surgery) To carry out an orchiectomy.orciprenaline(pharmacology) A bronchodilator used in the treatment of asthma.oreasterosideA particular steroid glycoside.organobromine(organic chemistry) Describing an organic compound containing one or more bromine atoms.organocultureThe tissue culture of whole organsorganocuprate(organic chemistry) Any organic cuprateorganogermane(organic chemistry) Any simple organogermanium compound (equivalent to a hydrocarbon or silane)organonitrate(organic chemistry) Any organic nitrate ester.organostibine(organic chemistry) Any organic derivative of stibine having at lease one carbon to antimony bondorganosulfate(organic chemistry) Any organic sulfate esterorganosulfide(organic chemistry) Also referred to as thioethers, a class of organic compounds RSR', where R and R' represent an alkyl group or other organic substituent. If R' is hydrogen, it is instead referred to as a thiol, or mercaptan.ornamentalize(transitive) To make ornamental.ornithichnite(paleontology) A fossilised footprint left by a bird.ornithologize(intransitive, uncommon) To practise ornithology.orthoarsenite(inorganic chemistry) The simple oxyanion of arsenic AsO₃³⁻; any salt containing this anionorthobenzoate(organic chemistry) Any orthoester, formally derived from benzoic acid, of general formula C₆H₅-C(OR)₃orthoceracone(malacology) A shell which has a straight cone shape.orthoceratiteAn orthoceras, or fossil shell thereof.orthochoaniteAny nautiloid cephalopod of the suborder OrthochoanitesorthochromiteAny of a group of mixed oxides of chromium and another metal (typically a rare earth element) of general formula MCrO₃orthocumulate(geology) A cumulate rock in which the groundmass is of different composition to the accumulated crystals.orthodenticleA homeobox gene involved in the development of the head.orthogonaliseAlternative form of orthogonalize.orthogonalize(transitive) To make orthogonal.orthographiseAlternative form of orthographize.orthographizeTo spell correctly or according to usage or pronunciation.orthopyroxene(mineralogy) Any pyroxene that forms orthorhombic crystals.orthopyroxineMisspelling of orthopyroxene.orthosilicate(inorganic chemistry) Any salt or ester of orthosilicic acid, (M⁺)₄SiO₄⁴⁻ or Si(OR)₄.orthovanadate(inorganic chemistry) The oxyanion of vanadium VO₄³⁻ or any salt containing this ionosajaxanthoneA yellow pigment found in certain plants.osmoreceptiveThat functions as an osmoreceptorosmosensitive(biology) sensitive to high salt concentrationsosmotoleranceThe quality or degree of being osmotolerant.ostreacultureArchaic spelling of ostreiculture (“oyster farming”).ostreicultureoyster farmingoteseconazoleA medication for the treatment of vaginal yeast infections.otomicroscopeAn otoscopic microscopeotophyllosideA particular steroid glycoside.otoprotectiveThat protects against ototoxicity or other damage to the earoutaccelerate(transitive) To accelerate faster than.outmanipulate(transitive) To surpass in manipulation or scheming.outrecuidance(archaic) Presumption, arrogance, self-conceit.outsourceableCapable of, or suitable for, being outsourced.outstrategize(transitive) To defeat with superior strategy.ovariectomiseAlternative form of ovariectomize.ovariectomize(transitive) To remove the ovaries from.overabundanceAn excess of what is needed or is appropriate.overadvantageThe state or condition of having excessive advantage.overadvertiseTo advertise excessively.overaggravate(transitive) To aggravate excessively.overapologize(intransitive) To apologize excessively.overassertiveToo assertive.overattentiveExcessively attentiveoverattribute(transitive) To attribute too much.overcalculateTo calculate as being greater than is actually the caseovercelebrateTo overindulge in activities that celebrate something; to party too hard.overchallenge(transitive) To challenge to an excessive degree.overclockableSuitable for overclocking.overcoherenceThe condition of being overcoherentovercriticizeTo criticize too much.overcultivate(transitive) To cultivate excessively.overdefensiveExcessively defensive.overdeferenceExcessive deference.overdesperateExcessively desperate.overdetermine(of a problem or question) To give too many constraints, so that no solution is available.overdiligenceExcessive diligence.overdominance(genetics) The case in which a heterozygote has a higher fitness or more extreme phenotype than either homozygote.overdramatise(British spelling) Alternative spelling of overdramatize.overdramatizeTo dramatize to excess; to make overdramatic.overduplicateTo duplicate excessivelyoverelaborateExcessively elaborate.overemphasiseNon-Oxford British English standard spelling of overemphasize.overemphasizeTo place too much emphasis on; to overstate the importance of.overencourageTo encourage too much.overenunciate(ambitransitive) To enunciate too strongly.overexcitableExcessively excitableoverexfoliateTo exfoliate excessively.overexoticize(transitive) To exoticize excessively; to make something appear overly exotic.overexpansiveToo expansive.overexquisiteExcessively exquisite; too exact or careful.overextensiveToo extensive.overfertilize(transitive) To treat (plants) with too much fertilizer.overgenderize(rare) To genderize too much; to unnecessarily assign masculine or feminine qualities to.overglamorize(transitive) To glamorize too much.overgratitudeExcessive gratitude.overguaranteeTo guarantee excessively.overimitativeExcessively imitative.overimposablesuperimposableoverinclusiveToo inclusive; tending to include too much.overinfluence(transitive) To influence unduly or excessively.overinsuranceThe act of insuring something for too great a value; excessive insurance.overintricateExcessively intricate.overlegislateTo create more rules than is necessary or sensible.overlubricate(transitive) To lubricate too much.overmodernizeTo modernize excessively.overmultitudeAn large excess in numbers.overobedienceexcessive obedienceoveroffensiveExcessively offensive.overoxygenateTo oxygenate excessively, that is, to give (a patient) too much oxygen therapy.overpenetrate(intransitive, transitive, weaponry, of a bullet or other projectile) To pass completely through a target and out the other side, potentially striking another person or object located further downrange.overplausibleExcessively plausible.overplenitudeExcessive plenitude.overpowerableAble to be overpowered.overprescribe(transitive) To prescribe (a drug) more frequently than appropriate.overprogrammeAlternative form of overprogram.overpronounce(transitive) To give an exaggerated pronunciation to.overprosecute(transitive) To prosecute (a crime or community) excessively.overpublicize(transitive) To publicize excessively.overpunctuateTo punctuate excessively.overreference(transitive) To reference too much or too often.overreplicateTo replicate excessivelyoverselectiveExcessively selective.oversensitiveHaving excessive sensitivity; reacting to stimuli too readily; thin-skinned.oversexualize(transitive) To sexualize excessively.oversocialize(intransitive) to socialize too muchoverspeculate(finance) To spend too much money in speculation.overstabilizeTo stabilize excessivelyoverstimulate(transitive) To stimulate to an excessive degree; to expose to excessive stimulation.overstructureThe upper structure or superstructure.oversubscribeTo subscribe to an extent that is greater than the availability.oversubsidize(transitive) To subsidize too much.overtalkativeExcessively talkative.overthrowableCapable of being overthrown.overvaccinateTo vaccinate too often, or too many members of a population.overvehemenceExcessive vehemence.overventilateTo ventilate excessivelyoverweightage(India) Extra or undue weight or importance.overwhelmableCapable of being overwhelmed.overwriteableAlternative form of overwritable.ovoperoxidase(biochemistry) Any peroxidase from an egg or oocyteovoprotectiveThat provides ovoprotectionoxalylglycine(organic chemistry) An amide formed from condensation of oxalic acid and the amino group of glycine; it is an inhibitor of some classes of enzymesoxamphetaminehydroxyamfetamineoxanorbornene(organic chemistry) Any of several oxygen-containing heterocycles derived from norbornene, especially those that are used to make polymersoxathiazinone(organic chemistry) A six-membered unsaturated heterocycle containing three carbon atoms (one of them as a carbonyl group) and one each of nitrogen, oxygen and sulfuroxathiolidine(organic chemistry) A saturated heterocycle that has three carbon atoms, one sulfur and one oxygen atomoxazaborolane(organic chemistry) oxazaborolidineoxazolidinone(organic chemistry) Any of a class of heterocyclic ketones, derived from oxazolidine, useful in organic synthesis.oxcarbazepine(pharmacology) An anticonvulsant and mood-stabilizing drug used primarily in the treatment of epilepsy, a structural derivative of carbamazepine.oxibuprocaineMisspelling of oxybuprocaine.oxidosqualene(organic chemistry) An epoxide derived from squaleneoxitriptylineA tricyclic anticonvulsant.oxodegradableThat degrades in the presence of oxygen.oxoderivative(organic chemistry) A derivative formally made by replacing a methylene group with a carbonyl oneoxomaritidine(organic chemistry) An alkaloid (1S,10R)-4,5-dimethoxy-9-azatetracyclo[7.5.2.01,10.02,7]hexadeca-2,4,6,13-tetraen-12-oneoxonorborneneAlternative form of oxanorbornene.oxopentanoate(organic chemistry) Any derivative of a pentanoate in which a methylene group is replaced by a carbonyl group; a salt or ester of an oxopentanoic acidoxopiperazine(organic chemistry) A heterocyclic ketone formed by replacing a methylene group of piperazine with a carbonyl groupoxopropanoate(chemistry) A salt or ester of oxopropanoic acid.oxpheneridine(pharmacology) A 4-phenylpiperidine derivative related to the opioid analgesic drug pethidine.oxtriphyllinecholine theophyllinate, an expectorant and bronchodilator derived from xanthineoxybismuthide(inorganic chemistry) Any compound that is a mixed oxide and bismuthideoxybuprocaine(pharmacology) A local anesthetic, used especially in ophthalmology and otolaryngology.oxycolchicineAn epoxide of colchicineoxyderivative(chemistry) A derivative compound obtained by reaction with oxygen.oxydimorphineSynonym of pseudomorphine.oxymetazoline(medicine, pharmacology) A sympathomimetic drug with vasoconstrictive activity that is used in the form of its hydrochloride C₁₆H₂₄N₂O·HCl chiefly as a topical nasal decongestant, developed from xylometazoline.oxyneolignane(organic chemistry) Any derivative of a neolignane in which the two propylbenzene residues are joined indirectly by an oxygen atomoxypyrimidine(organic chemistry) A phenol or ether derived from a pyrimidineoxystelmosideA particular steroid glycoside.