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17 Letter Words Starting With O

Explore 233 English words that start with O and contain exactly 17 letters. Common examples include octaazamacrocycle, oscillotonometric, osteofibromatosis, overacidification, overadvertisement.

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17-Letter O Words by Ending Letter

All 233 17-Letter Words Starting With O

objectionablenessThe quality of being objectionable.objectivisticallyIn an objectivistic manner.obliquotransverse(anatomy) oblique and transverseoccidentalizationThe process or result of occidentalizing.occipitobregmatic(anatomy) Of or relating to the occiput and the bregma.occipitofrontalis(anatomy) A large flat muscle on each side of the vertex of the skull, consisting of an occipital portion (arising from the occipital and temporal bones) and a frontal portion that are separated by the epicranial aponeurosis, and serving to draw the scalp backwards, raising the eyebrows and wrinkling the forehead.occipitofrontallyIn an occipitofrontal manner.occipitolaterallyIn an occipitolateral manner.occipitoposterior(anatomy) Having the occiput facing posteriorly or posterolaterally.occlusocervicallyIn the occlusocervical dimension or orientation.oceanographicallyIn terms of oceanography.octaazamacrocycleAny macrocycle that contains eight nitrogen atoms.octadehydrocorrin(organic chemistry) corroleoctafluoropropaneThe fluorocarbon perfluoropropane; a greenhouse gas used in plasma etching, refrigeration, and ultrasoundoctahydrochlorideAny compound that has eight hydrochloride groupsoctahydrocurcumin(organic chemistry) The metabolite of curcumin (3S,5S)-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-diol that shows anticancer activityoctakaidecahedronSynonym of octadecahedron.octakishexahedron(geometry, rare) A polyhedron with 48 faces.octanoylcarnitine(organic chemistry) The N-octanoyl derivative of carnitineoctatriacontanoicOf or pertaining to octatriacontanoic acid or its derivativesoculobuccogenitalRelating to the eyes, mouth, and genitals; applied to Behçet's disease.oculocephalogyricRelating to the turning of the eyes and head, typically towards a source of stimulationoculocerebrorenal(anatomy) Relating to the eyes, cerebrum, and kidneys; applied to Lowe syndrome.oculodentodigital(pathology) Affecting the eyes, teeth, and fingers.odontopaediatrics(dentistry) dentistry performed on infantsoesophagostenosisconstriction of the oesophagusoldfieldthomasiid(zoology) Any notoungulate mammal in the family Oldfieldthomasiidae.olfactometricallyBy means of olfactometry.oligocellodextrinAny cellodextrin that contains several glucose unitsoligochaetologistA scientist dedicated to the study of earthworms.oligodendrocytoma(pathology) A glioma whose cells resemble oligodendrocytesoligodendroglioma(oncology) A glioma believed to originate from the oligodendrocytes of the brain or from a glial precursor cell.oligodimerization(organic chemistry) The formation of oligodimersoligodinucleotide(biochemistry) An oligomer composed of dinucleotide unitsoligofractionatedsimple past and past participle of oligofractionateoligogalacturonic(biochemistry, in combination) Describing oligomers of galacturonic acidoligohydramniotic(medicine) Of, relating to, or characterised by oligohydramnios.oligomannosylated(organic chemistry) glycosylated with several mannosyl derivativesoligonucleotidase(biochemistry) Any enzyme that catalyses the hydrolysis of an oligonucleotide, but especially an exoribonuclease derived from Flammulina velutipes.oligoribonuclease(biochemistry) Any enzyme that hydrolyses oligoribonucleotidesoligosyndactylismSynonym of oligosyndactyly.oligotrophicationModification of an environment to make it oligotrophicoligotrophizationThe process of becoming oligotrophicoligozeugodactylyThe possession of several zeugopodaomnicomparativist(comparative linguistics, derogatory) having a tendency to compare disparate elements of language (e.g. different forms, unrelated languages) in an attempt to establish parallelsomnidimensionallyIn all dimensions.omnidirectionallyIn all directions.omphalomesenteric(anatomy) Of or pertaining to the umbilicus and mesentery.oncodevelopmental(oncology) Relating to the development of a canceroncohematological(pathology) Relating to blood canceroncoimmunotherapyThe use of immunotherapy to treat cancersoncoproteogenomicRelating to oncoproteogenomes.onomasiologicallyIn an onomasiological manner or context.onomatopoeticallyIn an onomatopoetic manner.onomotopoeticallyBy means of onomatopoeia.ontotheologicallyIn terms of ontotheology.operationalisableAlternative spelling of operationalizable.operationalizablePossible to operationalize; subject to operationalization.ophiostomataceous(mycology) Belonging to the family Ophiostomataceae.ophthalmogeometry(biometrics) The positioning and separation of the eyesophthalmoscopicalSynonym of ophthalmoscopic.ophthalmotemporalRelating to the eye and the templeopisthobranchiate(zoology, obsolete) Of or pertaining to the Opisthobranchia.opportunisticallyIn an opportunistic manner.optoelectroactiveoptically electroactiveoptophysiological(physiology) Relating to optophysiologyoptospectroscopicRelating to optical spectroscopyorganoautotrophicRelating to organoautotrophyorganochlorinatedDescribing a chlorinated organic compound, especially such a pesticide or other pollutant.organohalogenatedContaining organohalogensorganoheterotroph(biology) Any heterotroph that obtains organic material from another organism (typically as food)organophosphatase(biochemistry) Any enzyme that catalyses the hydrolysis of organophosphate estersorganophosphonate(organic chemistry) Any organic phosphonateorganophosphorousMisspelling of organophosphorus.organosedimentary(geology) organic / biological and sedimentaryorganospecificityThe condition of being organospecificorganotherapeuticRelating to organotherapy.organotrophicallyBy means of organotrophyoriginalisticallyIn an originalistic manner.ornithogeographerOne who studies ornithogeography.ornithogeographicRelating to ornithogeography.ornithophaenologyThe scientific study of the migration of birdsorogastroduodenalRelating to the mouth, stomach and duodenumorohypopharyngeal(anatomy) Relating to the orohypopharynxoronasopharyngeal(anatomy) Relating to the oronasopharynxorthobenzoquinone(organic chemistry) One of the two isomers of quinone, 1,2-benzoquinone.orthobothriotaxicRelating to orthobothriotaxy.orthocomplemented(mathematics, of a lattice) Having orthocomplementation.orthoconglomerate(geology) A conglomerate containing mostly clastsorthoevolutionaryOf or relating to orthoevolution.orthogonalisationAlternative spelling of orthogonalization.orthogonalization(mathematics) The process of converting a set of functions or vectors into orthogonal ones.orthogravitropism(botany) The normal tendency of a plants parts to bend downward under the effects of gravityorthohepadnaviralRelating to orthohepadnavirusesorthohepadnavirusAny virus of the genus Orthohepadnavirusorthominasragrite(mineralogy) An orthorhombic-pyramidal mineral containing hydrogen, oxygen, sulfur, and vanadium.orthopantomographA panoramic dental X-ray deviceorthopediatricianA doctor who specializes in orthopedicsorthophenylphenol(organic chemistry) A biocide used as a preservative, consisting chemically of two linked benzene rings and a phenolic hydroxyl group.orthophotographicOf or relating to orthophotography.orthopsychiatristA psychiatrist involved in orthopsychiatry.orthopterologicalRelating to orthopterology.orthostereoscopic(optics) That produces a three-dimensional image free from distortionorthosubstitution(organic chemistry) Any substitution reaction that introduces an atom or group into the ortho- positionoryctognostically(obsolete) In a manner relating to oryctognosy.oscillatoriaceous(bacteriology, relational) Of or relating to the Oscillatoriaceae.oscillometricallyIn an oscillometric manneroscillotonometricOf or relating to oscillotonometry or the oscillotonometer.osmoheterotrophicRelating to osmoheterotrophyosmophysiologicalRelating to osmotic pressure and physiologyosseoconductivityAlternative form of osteoconductivity.osteclastogenesisAlternative form of osteoclastogenesis.osteoarchaeologicAlternative form of osteoarchaeological.osteoarcheologistAlternative form of osteoarchaeologist.osteobiographicalOf or relating to osteobiography.osteochondroblast(cytology) A chondroblast found in bone tissueosteochondrocyticRelating to or composed of osteocytes and chondrocytes.osteochondrogenicCausing or relating to osteochrondrogenesis.osteochondropathy(pathology) Any disease of bone and cartilageosteochondrophyte(biology) a tumor composed of bone and cartilageosteoconductivityProperty of a biomaterial that encourages osteoconduction.osteodegenerationThe degeneration of bone tissueosteodegenerativeRelating to osteodegenerationosteodensitometry(medicine) The measurement of bone mineral density (as a diagnostic for osteoporosis)osteodontokeratic(archaeology) Relating to any culture in which tools were made from bone, tooth and hornosteofibromatosis(medicine) Any syndrome of multiple osteofibromas, not specific to just a single disease entity in modern histopathology classifications.osteofluorochromeA form of fluorochrome used to stain bone tissueosteohistogenesisThe histogenesis of bone tissueosteohistogeneticRelating to osteohistogenesisosteohistologicalof or relating to osteohistologyosteolathyrogenicCausing osteolathyrism.osteomioarticularRelating to muscles and articulation of bonesosteomorphometricRelating to osteomorphometryosteomyoarticularRelating to muscles and articulation of bonesosteomyocutaneousRelating to bone, muscle and skinosteopathologicalRelating to osteopathology.osteopetrorickets(pathology) osteopetrotic ricketsosteoregenerationThe regeneration of bone tissueosteoregenerativeThat promotes osteoregenerationotolaryngologicalPertaining to otolaryngology.otolaryngologistsplural of otolaryngologistotoneurologicallyIn terms of otoneurology.otorhinolaryngeal(anatomy) otolaryngealovariectomizationThe process, or the result of ovariectomizingoveraccommodation(sociolinguistics) excessive convergence; the situation where a speaker is overaccommodativeoveraccommodative(sociolinguistics) excessively accommodativeoveracidificationSynonym of hyperacidification.overadvertisementExcessive advertising.overambitiousnessThe quality of being overambitious.overamplification(chiefly music) Excessive amplification.overapproximationAn approximation that is higher than the true value.overargumentativeExcessively argumentative.overartificialityThe quality of being overartificial.overassertivenessThe quality of being overassertive.overattentivenessThe quality of being overattentive.overcalcificationExcessive calcification.overcertificationThe act or result of overcertifying.overcollateralize(transitive) To collateralize for too large an amount.overcommercialize(transitive) To make excessively commercial.overcommunicationExcessive communication; communicating too much.overcompassionateShowing too much compassion.overcomplicatedly(rare) In an overcomplicated way.overcomplimentaryExcessively complimentary.overconcentrationExcessive concentration.overconnectednessThe quality or condition of being overconnected.overconscientiousExcessively conscientious.overconsciousnessExcessive consciousness of something.overconsolidationExcessive consolidationovercontextualize(transitive) To contextualize excessively.overdeterminationThe state or quality of being overdeterminedoverdevelopednessThe quality of being overdeveloped.overdocumentationExcessive documentation.overdomesticationexcessive domesticationoverdramatisationAlternative spelling of overdramatization.overdramatizationThe act or process of overdramatizing.overelaboratenessThe state or condition of being overelaborate.overembellishmentExcessive embellishment.overencouragementExcessive encouragement.overextrapolationexcessive extrapolation, as when drawing conclusions from dataoverextravagantlyIn an overextravagant manneroverfactorization(statistics) The use or consideration of excessive factors in factor analysis.overfertilisationAlternative form of overfertilization.overfertilizationExcessive fertilization; the overuse of fertilizer.overfortificationExcessive fortification.overfragmentationExcessive fragmentationovergenderizationAlternative form of over-genderization.overglamorizationThe process of overglamorizing.overglorificationExcessive glorification; excessive praise.overincarcerationThe incarceration of an excess number of people.overinclusivenessThe quality of being overinclusive.overindividualismExcessive individualism.overindustrialiseAlternative form of overindustrialize.overindustrialize(transitive) To industrialize to an excessive degree.overinterrogationThe interrogation of a transponder by too many ground stations.overjustificationExcessive justification.overmagnificationexcessive magnificationovermasterfulnessExcessive masterfulness.overmodernizationExcessive modernization.overparticipationExcessive participation.overparticularityExcessive particularity or fastidiousness.overpaternalisticToo paternalistic.overphilosophicalExcessively philosophical.overpreoccupationexcessive preoccupationoverproliferationExcessive proliferationoverproliferativeExcessively proliferativeoverpronunciationExaggerated pronunciation.overproportionateoverproportionedoverproportioningpresent participle and gerund of overproportionoverqualificationThe quality of being overqualified.overrefrigerationExcessive refrigeration.overresuscitation(medicine) The administration of an excessive amount of fluid during an attempt to resuscitate somebody.oversensationallyIn an excessively sensational manner.oversensitivenessThe characteristic of being oversensitive.oversentimentallyIn an oversentimental manner.oversexualizationExcessive sexualization.oversignificationThe process or result of oversignifying; (attachment of) excessive significance (to something).oversocializationexcessive socializationoversophisticatedExcessively sophisticated.overspecificationExcessive specificationoversqueamishnessThe quality of being oversqueamish.overstabilizationExcessive stabilizationoverstrenuousnessThe quality of being too strenuous.oversuperstitiousExcessively superstitious.overtalkativenessThe quality of being overtalkative.overtranscription(genetics) Excessive transcriptionoviraptorosaurianAny maniraptoran dinosaur of the clade OviraptorosauriaovoviviparousnessThe quality of being ovoviviparous.oxabicycloheptene(organic chemistry) A bicyclic heterocycle composed of a cycloheptene ring attached to an oxacycloheptene ring by a single bondoxazolidinedionesplural of oxazolidinedioneoxazolidinethione(organic chemistry) Any cyclic thione derived from oxazolidine.oxyhaemochromogenAlternative form of oxyhemochromogen.oxyhydroxysulfate(inorganic chemistry, mineralogy) Any material having oxide, hydroxide and sulfate groups.oxyphotobacteriumAny photobacterium, of the class Oxyphotobacteria, that produces oxygen

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