Other Ending Letters

Word Lengths Starting With O

All 824 Matching Words

oakgallAlternative spelling of oak gall.oatenmeal(obsolete) oatmealoathfulInclined to swear oaths, or curse.oatmealMeal made from rolled or round oats.obcellA hypothetical proto-organism consisting of a cup-shaped half-cell.obconicalAlternative form of obconic.obediential(obsolete, usually religion) Of or related to obedience; or obedient.obeliscalresembling, or pertaining to, an obelisk.obfuscationalRelating to or employing obfuscation; obfuscatory.obital(obsolete) Of or relating to an obit.obitualOf or relating to obits.obituarialOf or relating to an obituary.objectalHaving the form of an object or objects; pertaining to the physical form of something; material.objectionalobjectionableobjectival(grammar) Of or pertaining to the object of a sentence.objectualRelating to, or represented as an objectoblationalOf or pertaining to oblation; oblatoryobligationalPertaining to, or in the nature of, obligation.obliquolateral(anatomy) oblique and lateraloblivialOf or relating to oblivion.oblongatalOf or pertaining to the medulla oblongata.obloquialOf or relating to obloquy.obol(historical) A silver coin of Ancient Greece.oboval(botany, rare) obovateobsequialRelating to an obsequy or funeral rite.observationalRelating to observation, especially scientific observation.observatorialRelating to an observatory.obsessionalMarked by obsessionobsidionalPertaining to a siege.obstetricalAlternative form of obstetric.obstipationalOf or relating to obstipation.obstructionalBeing or relating to an obstruction.obtainalThe obtaining of something; acquisition.obturationalOf or relating to obturation.obtusifoliolA phytosterol found in some vegetable oil.occasionalOccurring or appearing irregularly from time to time, but not often; incidental.occidentalOf, pertaining to, or situated in, the occident, or west; western.occipital(anatomy) Of, pertaining to, or located within or near the occiput (back of the head) or the occipital bone.occipitoatlantal(anatomy) Relating to the occiput and the atlas.occipitoatlantoaxial(anatomy) Relating to the articulation of the occiput and atlas with the axis.occipitoaxial(anatomy) Of or pertaining to the occipital bone and second vertebra, or axis.occipitocervical(anatomy) Relating to the occiput and the neck.occipitocortical(anatomy) Relating to the occiput and the cerebral cortexoccipitocranial(anatomy) Relating to the occiput and the craniumoccipitofacial(anatomy) Of or relating to the occiput and the face.occipitofrontal(anatomy) Of or pertaining to the occipital and frontal bones of the skull.occipitolateral(anatomy) Having the occiput facing laterally.occipitomental(anatomy) Of or relating to (the distance between) the chin and the occiput.occipitonasalRelating to, or between, the occipital bone and the noseoccipitonuchal(anatomy) Of or relating to the occiput and the back of the neck.occipitoparietal(anatomy) Relating to the occipital and the parietal bonesoccipitosacral(anatomy) occipital and sacraloccipitosphenoidal(anatomy) occipital and sphenoidaloccipitotemporal(anatomy) Of or pertaining to the occiput and temporal lobe.occipitoventral(anatomy) occipital and ventralocclusal(dentistry) On the side of a tooth which mates with the opposing tooth.occlusionalOf or relating to occlusion.occlusobuccal(dentistry) occlusal and buccalocclusogingival(dentistry) Relating to the occlusal and gingival sides of a toothocclusoproximalocclusal and proximalocculodentodigitalMisspelling of oculodentodigital.occultural(imprecisely) Of or pertaining to the occult; occultic.occupationalOf, belonging, or relating to an occupation (in any sense).occurrentialOf, pertaining to, or essentiating an occurrence or occurrences; occurrent.oceanfulThe amount that an ocean can hold.oceanographicalOf or pertaining to oceanography, the science of oceans.oceanologicalOf or pertaining to oceanology.ocelloccipitalRelating to the ocellus and the occiputocellorbitalRelating to the ocellus and the orbit of the eyeocfentanil(pharmacology) An opioid analgesic.ochlocraticalPertaining to ochlocracy.ochrosol(soil science) A deeply-weathered latosolocnophil(psychoanalysis) A personality type characterised by avoidance of dangerous of unfamiliar situations, and the reliance on other people for security.octachlorobiphenyl(organic chemistry) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atomsoctacosanol(organic chemistry) Any aliphatic alcohol derived from octacosane, but especially 1-octacosanol that is found in plant waxesoctactinalOf a sponge spicule: having eight rays.octadecadienoyl(organic chemistry, especially in combination) The univalent radical derived from octadecadienoic acid by loss of the hydroxy groupoctadecahedralIn the form of an octadecahedron.octadecanal(organic chemistry) The aliphatic aldehyde that has 18 carbon atomsoctadecanethiol(organic chemistry) The aliphatic thiol that has 18 carbon atomsoctadecanol(organic chemistry) Any saturated aliphatic alcohol that has eighteen carbon atoms, but especially 1-octadecanoloctadecanoyl(organic chemistry, especially in combination) The univalent radical derived from octadecanoic acid by loss of the hydroxy group; stearoyloctadecatrienol(organic chemistry) An aliphatic alcohol that has eighteen carbon atoms and three double bondsoctadecatrienoyl(organic chemistry, especially in combination) The univalent radical derived from octadecatrienoic acid by loss of the hydroxy group; linolenoyloctadecenol(organic chemistry) Any of many isomeric aliphatic alcohols that have eighteen carbon atoms and a double bondoctadecenoyl(organic chemistry, especially in combination) The univalent radical derived from octadecenoic acid by loss of the hydroxy group; oleoyloctadecyl(organic chemistry) Any of very many isomeric univalent hydrocarbon radicals, C₁₈H₃₇, formally derived from an octadecane by the loss of a hydrogen atomoctadienal(organic chemistry) Any of several isomeric unsaturated aliphatic aldehyde having eight carbon atoms and two double bondsoctaedralArchaic form of octahedral.octaethyl(organic chemistry, in combination) Eight ethyl groups in a moleculeoctaethyleneglycol(organic chemistry) The dihydroxy polyether formed from eight molecules of ethylene glycol.octagonal(geometry) Shaped like an octagon, in having eight sides and eight angles.octahedralOf, relating to, or having the shape of an octahedron.octal(arithmetic, computing, uncountable) The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.octamethyl(organic chemistry) (in combination) eight methyl groups in a moleculeoctanal(organic chemistry) The saturated aliphatic aldehyde having eight carbon atoms.octanethiol(organic chemistry) Any thiol derived from an octane, but especially 1-octanethioloctanol(organic chemistry) Any of many isomers of the saturated aliphatic alcohol having eight carbon atoms, but especially the simple primary alcohol n-octanol; its esters are used in perfumeryoctanoyl(organic chemistry, especially in combination) The univalent radical derived from octanoic acid by loss of the hydroxy group; capryloyloctantalRelating to an octant.octaprenyl(organic chemistry, in combination) Formed from eight isoprene unitsoctaval(music) Of, pertaining to, or relating to an octave.octavofinal(sports, US) A match or game between two of the last sixteen competitors in a given tournament or sporting competition.octenal(organic chemistry) Any of several isomeric unsaturated aliphatic aldehydes having eight carbon atoms and one double bondoctennialOccurring every eight years.octenol1-octen-3-ol, a chemical in human breath and sweat that attracts biting insects such as mosquitoes.octenyl(organic chemistry, especially in combination) Any of several isomeric radicals derived from an octeneoctitol(biochemistry) Any sugar alcohol having eight carbon atomsoctocentennialRelating to an octocentenaryoctocoral(marine biology) An anthozoan of the subclass Alcyonaria, having eight-branched tentacles and eight septa.octodecimal(crystals) Having eight times ten faces.octoedrical(obsolete) octahedraloctofinalAlternative form of octafinal.octofoilHaving eight lobes or leaves.octogesimalBased on the number eighty; used to describe the Réaumur scale.octogonalObsolete form of octagonal.octolingualWritten in eight languages.octopal(uncommon) Octopuslike.octopodalOctopoid, octopuslike.octopodial(rare) Synonym of octopodal, octopuslike.octopoidalOctopoid, octopuslike.octopusial(rare) Octopoid; octopuslike.octopusical(rare) Synonym of octopusine.octoradialradiating outward in eight directionsoctosyllabicalAlternative form of octosyllabic.octoyl(organic chemistry) A hypothetical radical, C₈H₁₅O, regarded as the essential residue of octoic acid.octyl(organic chemistry) Any of very many isomeric univalent hydrocarbon radicals, C₈H₁₇, formally derived from octane by the loss of a hydrogen atomoctylphenol(organic chemistry) A type of alkylphenol.oculoauriculovertebralRelating to the eyes, ears, and vertebrae; applied to Goldenhar syndrome.oculobuccogenitalRelating to the eyes, mouth, and genitals; applied to Behçet's disease.oculocerebral(anatomy) Relating to the eye and the cerebrum.oculocerebrorenal(anatomy) Relating to the eyes, cerebrum, and kidneys; applied to Lowe syndrome.oculodentodigital(pathology) Affecting the eyes, teeth, and fingers.oculodermalRelating to the eye and skin; applied to a form of melanocytosis that affects the face.oculodigital(pathology) Relating to the eyes and the fingersoculodigitoesophagoduodenal(pathology, anatomy) Relating to a combination of structures involving the eye, digits/fingers, esophagus, and duodenum, applied to Feingold syndrome.oculodorsal(anatomy) dorsal to the eyeoculofacialOf or pertaining to the eyes and face.oculofacioskeletalRelating to the eyes, face, and skeleton.oculogenitalRelating to the eyes and genitals.oculogyralRelating to oculogyrationoculoleptomeningealRelating to the eyes and the leptomeningesoculomandibulofacial(pathology) Affecting the eyes, jaw, and face.oculomanualRelating to coordination between eye and hand movementoculonasalPertaining to the eyes and nose.oculopalatalRelating to the eye and the palateoculopalpebral(anatomy) Relating to the eye and the eyelid.oculopharyngeal(anatomy) Relating to both the eye and the throat (especially to their respective muscles)oculopharyngodistaloculopharyngeal and distaloculorenal(pathology) Pertaining to the eyes and kidneys.oculoskeletalRelating to, or affecting the eyes and the skeletonoculospinalRelating to the eyes and the spine.odalThe ownership and claim of such land.oddballAn eccentric or unusual person.odmyl(organic chemistry, archaic) A volatile liquid with an unpleasant garlic odour, obtained by boiling sulfur with linseed oil.odometricalOf or pertaining to an odometer or to odometry.odonatologicalRelating to odonatology.odontofacialRelating to the teeth and the faceodontological(rare) referring or pertaining to odontology; dentalodontophoralRelating to the odontophore.odontoskeletalRelating to teeth and the skeletonodourfulAlternative form of odorful.odylObsolete spelling of odyle.oecumenicalAlternative spelling of ecumenical.oedipalAlternative letter-case form of Oedipal.oenanthalAlternative form of enanthal.oenochemical(chemistry) Relating to oenochemistryoenologicalOf or pertaining to oenology, the study of wine.oenomelA beverage made of wine and honey.oenophilDated form of oenophile.oesophagalAlternative form of esophageal.oesophagealAlternative spelling of esophageal.oesophagobronchialAlternative form of esophagobronchial.oesophagopharyngealAlternative form of esophagopharyngeal.oestradiolBritish standard spelling of estradiol.oestratetraenolAlternative form of estratetraenol.oestriol(British spelling, biochemistry, steroids) Alternative spelling of estriol.oestrualRelating to the oestrus.offalThe internal organs of an animal (entrails or innards), used as food.offdiagonal(linear algebra) That is not an element on the diagonal of a square matrix.offenceful(archaic) offensiveoffenseful(archaic) offensive; displeasing.offertorialRelating to an offering, or the ritual of offertory.officalMisspelling of official.officefulThe amount that fills an office.officerialOf or relating to officers.officetel(South Korea) a multi-purpose building in Korea with both residential and commercial unitsofficewall(nonstandard) Alternative spelling of office wall.officialOf or about an office or public trust.officinal(dated) Medicinal.offshell(mathematics, physics) That does not conform to classical physics.ogdohedral(of a crystal) Having hemimorphic trigonal pyramidal symmetryogivalHaving the curved, pointed shape of an ogive.ohel(Judaism) A structure erected over the grave of a great and righteous person.ohmefentanyl(pharmacology) A particular narcotic painkiller.oidialRelating to, or infected with oidiumoikball(derogatory, informal, chiefly Oxbridge and rugby) Association football.oilwellAlternative form of oil well.oinomelAlternative form of oenomel.olNonstandard form of ol'.oldschoolAlternative form of old school.oldskoolAlternative form of old skool (“hip-hop or rap music of the late 1970s and 1980s (or more recent music of this style) as contrasted with newer styles of such music”) (alternative spelling of old school).olecranal(anatomy) Of or pertaining to the olecranon.olecranial(anatomy) Synonym of olecranal.oleocanthal(biochemistry) A tyrosol ester isolated from extra-virgin olive oil, with anti-inflammatory and antioxidant properties.oleochemical(organic chemistry) Any organic compound derived from a natural vegetable oil or animal fatoleogelA thixotropic gel, composed of silica in linseed oil, used in oil paintingoleoyl(organic chemistry, especially in combination) The univalent carbonyl radical derived from oleic acidolericulturalRelating to olericulture.oleyl(chemistry) The radical of oleic acid, derived from the non-drying oils.oliebolA traditional Dutch and Belgian delicacy, a pastry similar to a donut.oligarchal(dated) Oligarchic, oligarchical.oligochaetologicalRelating to oligochaetology.oligoclonal(genetics) Relating to an oligoclone, or to just a few clonesoligocyclopropyl(organic chemistry) Describing a compound having a short chain of linked cyclopropane ringsoligodendrogialMisspelling of oligodendroglial.oligodendroglialOf or pertaining to the oligodendrogliaoligodendrogliomal(pathology) Relating to an oligodendrogliomaoligodendromalAlternative form of oligodendrogliomal.oligodiol(organic chemistry) Synonym of oligoether.oligofocalHaving several focioligofunctionalHaving a few functionsoligogalactosyl(organic chemistry, in combination) Several galactosyl groups in a moleculeoligolecithal(biology) Having a small amount of yolk in the cytoplasmoligomannosyl(organic chemistry, in combination) Several mannosyl groups in a moleculeoligomineral(Of water) Having few dissolved minerals.oligoneuralSynonym of oligoneuronal.oligoneuronalRelating to a few neuronsoligonolA mixture of low-molecular-weight polyphenols found in the lychee.oligonucleosomalOf or pertaining to an oligonucleosomeoligophenyl(organic chemistry) Any of a family of linear aromatic hydrocarbons having a structure of several benzene rings joined by single bondsoligoprenolSynonym of prenol.oligoprenyl(organic chemistry, in combination) Any univalent radical formed from several isoprenyl moietiesoligosaccharylRelating to an oligosaccharideoligosilanyl(inorganic chemistry) A univalent radical derived from an oligosilaneoligosomalRelating to, or being an oligosome.oligospiroketalAn oligomer composed of spiroketal monomers.oligotropicalMisspelling of oligotrophic.olivetol(organic chemistry) 5-pentylresorcinol or 5-pentyl-1,3-benzenediol, an organic compound found in certain lichens. It is also a precursor in various syntheses of tetrahydrocannabinol.olivil(organic chemistry) A white crystalline substance, obtained from an exudation from the olive, and having a bittersweet taste and acid properties.olivospinalRelating to the olivary nucleus and spine.olodaterol(pharmacology) The bronchodilator 6-hydroxy-8-{(1R)-1-hydroxy-2-{[1-(4-methoxyphenyl)-2-methylpropan-2-yl]amino}ethyl}-4H-1,4-benzoxazin-3-one.omasalRelating to the omasum.ombrophilAlternative form of ombrophile.omegaball(sports) A variant of soccer (“association football”), played on a round pitch with more than two teams, and associated goals.omental(anatomy) Of or pertaining to an omentum or the omenta.omileticalObsolete form of homiletical.ommateal(zoology, archaic) Of or pertaining to an ommateum (compound eye).ommatidialOf or pertaining to the ommatidia.omnibusful(dated) Enough to fill an omnibus.omnicausalBeing the cause of everything.omnichannel(business) Integrating all physical (offline) and digital contact channels to provide a unified customer experience.omnicidalOf or relating to omnicide.omnicorporealComprehending or including all bodies; embracing all substance.omniculturalRelating to all culturesomnidenominationalOf or relating to all denominations.omnidimensionalRelating to, or existing in, all dimensions simultaneously.omnidirectional(physics, electrical engineering) Having a ring-shaped radiation pattern, with equal radiation in all azimuthal directions.omnifacial(sculpture) Suitable for viewing from any direction.omnilateralOn all sides of an issue or object.omnilingualHaving the ability to speak, or to understand, all languages.omnipotentialAllowing for every possibility; unlimited in potential.omnipresential(obsolete) Omnipresent; present everywhere.omniracial(sociology, philosophy) Concerning or including every race.omnisexualAndrogynous, exhibiting traits of all sexes.omnispatialThroughout space; everywhere in space.omnitemporalapplicable at all timesomniversalRelating to the omniverse.omniwheelAlternative form of omni wheel.omosternal(anatomy) Of or pertaining to the omosternum.omphacomelA form of mead made with verjuice.omulAny of the salmon-like fish of species Coregonus migratorius (syn. Coregonus autumnalis migratorius), native to Lake Baikal in SiberiaonchocercalRelating to worms of the genus Onchocerca or to the disease onchocerciasisoncodevelopmental(oncology) Relating to the development of a canceroncofetalTypically present only during fetal development, but also found in adults with certain cancers.oncofoetalAlternative form of oncofetal.oncogenicalAlternative form of oncogenic.oncohaematologicalAlternative form of oncohematological.oncohematological(pathology) Relating to blood canceroncological(oncology) Of or pertaining to oncology.oncomiracidialRelating to the oncomiracidiaonconeuralRelating to cancer and to the neural system.onconeuronalRelated to cancer and to neurological syndromesoncoretroviralOf, pertaining to, or caused by an oncoretrovirus.oncornaviralRelating to oncornaviruses.oncospheralRelating to an oncosphereoncosurgical(surgery) Relating to cancer surgery.oncoviralRelating to an oncovirusondolA Korean form of underfloor heating that uses direct heat transfer from wood smoke to the underside of a thick masonry floor.onedimensionalAlternative form of one-dimensional.oneirocriticalOf or relating to the interpretation of dreams.oneirologicalRelating to oneirology.onfallA falling on or upon; an attack, onset, or assault.onomanticalAlternative form of onomanticonomasiologicalOf or pertaining to onomasiology.onomatologicalRelating to onomatology, the study of the origins of names.onomatopoeial(obsolete, rare) Of or pertaining to onomatopoeia.onomatopoeicalAlternative form of onomatopoeic.onomatopoeticalonomatopoeiconomatopoieticalAlternative form of onomatopoetic.onsell(British, business, transitive) To sell (a purchased item) to a second buyer.onshell(mathematics, physics) That conforms to classical physicsonticalOf or relating to ontology.ontoepistemologicalRelating to ontoepistemology.ontogenicalAlternative form of ontogenic.ontographicalRelating to ontography.ontologicalOf or relating to ontology.ontotheologicalRelating to ontotheology.ooecialRelating to the ooecium.oogonialof or pertaining to an oogoniumoogoniolA particular fungal sex hormone.oologicalOf or relating to oology.oomyceticidalThat kills oomycetesoorialAlternative form of urial.oothecalRelating to an ootheca.oozelAlternative form of ouzel.opalThe colour of opal: any shade of blue with bright flecks of other colours, such as white, yellow, and red.openbillEither of two species of bird in the genus Anastomus of the stork family Ciconiidae, with a distinctive gap between the mandibles of the closed bill.operaticalAlternative form of operatic.operationalOf or relating to operations, especially military operations.operatorial(mathematics) Of or pertaining to an operatorophiologicalOf or relating to ophiology.ophthal(medicine, colloquial) Ophthalmology.ophthalmolAbbreviation of ophthalmology.ophthalmologicalPertaining to ophthalmology.ophthalmopathological(pathology) Relating to ophthalmopathologyophthalmoscopicalSynonym of ophthalmoscopic.ophthalmotemporalRelating to the eye and the templeopianyl(chemistry) meconinopinional(rare) Based on or constituting an opinion.opipramolA psychoactive drug used as an anxiolytic and antidepressant.opisthonotal(entomology) opisthosomal and dorsalopisthorchidalRelating to the opisthorchidsopisthosomalRelating to the opisthosoma.opmonoidal(mathematics) Having a natural family of distributive morphisms and an identity morphism that are coherent.opposal(archaic) oppositionoppositionalOf, pertaining to, or exhibiting opposition.oppressionalExhibiting or relating to oppression.opticalOf or relating to sight; visual.opticospinalOf, pertaining to, or affecting the optic nerve and the spinal cordoptimalThe best, most favourable or desirable, especially under some restriction.optimizationalRelating to optimizationoptionalNot compulsory; left to personal choice; elective.optochemical(physiology) Relating to the chemical processes involved in sight or visionoptoelectricalAlternative form of optoelectric.optoelectromechanicaloptoelectric and electromechanicaloptogeneticalAlternative form of optogenetic.optologicalOf or relating to optology.optomechanicalOf or pertaining to optomechanicsoptometricalOf or pertaining to optometry.optophysiological(physiology) Relating to optophysiologyoptothermalRelating to light and heatoral(relational) Relating to the mouth.oralnasal(rare) oronasalorangepillAlternative spelling of orange pill.oratorial(rare) oratorical.oratoricalof, or relating to oratory or an orator.orbicalSynonym of orbicular.orbifrontalAlternative form of orbitofrontal.orbitalOf or relating to, or forming an orbit (such as the orbit of a moon, planet, or spacecraft).orbitational(astronomy) Of, or related to an orbit or orbiting.orbitocerebral(anatomy) Relating to the orbit of the eye and the brainorbitofrontalLocated in the frontal lobes above the orbits of the eyes.orbitoidalOf or pertaining to an orbitoid.orbitolateral(anatomy) lateral to the orbit of the eyeorbitomeatalRelating 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.orbitonasal(anatomy) Of, pertaining to, or between the eye socket and the nose.orbitoprefrontal(anatomy) orbital and prefrontalorbitosphenoidal(anatomy) Of or pertaining to the orbitosphenoid bone.orbitostriatal(anatomy) orbital and striatalorbitotemporalRelating to the orbit (of the eye) and the templeorbiviralRelating to orbivirusesorchalObsolete form of orchil.orchardfulThe quantity or number which fills an orchard.orchelAlternative spelling of orchil.orchestralRelating to an orchestra or to music played by an orchestra.orchestrationalOf or pertaining to orchestration.orchidologicalOf or pertaining to orchidology.orchilAny of several lichens, especially those of the genera Roccella and Lecanora.orcinol(organic chemistry) A natural phenolic organic compound that occurs in many species of lichen, used in the production of orcein and as a reagent in some chemical tests for pentosesordeal(figuratively) A painful or trying experience.ordinal(mathematics, of a number) Indicating position in a sequence.ordoliberal(economics, politics) Of or relating to ordoliberalism.oreinirostralHaving a tall, domed beak or snout.oreographicalOf or pertaining to oreography.oreologicalAlternative form of orological.orfulPronunciation spelling of awful.orgal(chemistry) Obsolete form of argol.organal(music) Relating to organum.organicalArchaic form of organic.organisational(British spelling) Alternative spelling of organizational.organismalOf or relating to an organism or organisms.organizationalOf, relating to, or produced by an organization.organoarsenicalSynonym of organoarsenic.organochemicalRelating to organic chemistryorganodetritalRelating to or composed of organic detritus.organofunctional(biochemistry, of a substance) Having a function in organisms.organogelA liquid organic phase containing a three-dimensional cross-linked networkorganographicalAlternative form of organographic.organoheteryl(organic chemistry) any univalent radical, containing carbon, but which has its free valence at an atom other than carbonorganolepticalAlternative form of organoleptic.organologicalOf or relating to organology.organomercurialDescribing any organic compound of mercuryorganometal(organic chemistry) Any simple organometallic compound of general formula RₙMorganomineralComposed of both organic and mineral componentsorganonickel(organic chemistry) Describing any organic compound containing a carbon to nickel bondorganopathologicalorganic and pathologicalorganophosphoryl(organic chemistry, especially in combination) Any organic phosphoryl radicalorganosilanol(organic chemistry) Any organic silanolorganosilyl(organic chemistry) Describing any organic compound containing a carbon to silicon bondorganosolA histosol, a soil comprising chiefly organic material.organotypicalAlternative form of organotypic.organyl(chemistry) any univalent radical having its free valence at a carbon atomorgasmical(rare) Synonym of orgasmic.orgiasticalAlternative form of orgiastic.orgueil(archaic) Pride.oriel(architecture) A large polygonal recess in a building, such as a bay window, forming a protrusion on the outer wall.orientalAlternative letter-case form of Oriental.orientanol(organic chemistry) A pterocarpan isolated from the wood of Erythrina orientalis.orientationalOf or pertaining to orientation.orifacialAlternative form of orofacial.orificalOf, or pertaining to an orifice.orificial(medicine) Of or relating to the orifices of the body.original(not comparable) Relating to the origin or beginning; preceding all others.originallObsolete spelling of original.orignal(obsolete) A moose.orinasal(phonetics) A speech sound produced using both the mouth and the nose.oriolArchaic spelling of oriel.orismologicalOf or pertaining to orismology.orl(in some British dialects, now rare) An alder tree.ornamentalServing as an ornament; having no purpose other than to make more beautiful.ornamentationalRelating to ornamentationornithogeographicalRelating to ornithogeography.ornithologicalOf or pertaining to ornithology.oroanalInvolving the mouth and anus.oroantralRelating to the oral and antral cavities.orobanchol(organic chemistry) A strigolactone that acts as a germination stimulantorobanchyl(organic chemistry) The univalent radical derived from orobancholorobol(organic chemistry) An isoflavone, found in Aspergillus niger and Streptomyces neyagawaensis, that is a potent inhibitor of phosphoinositide 3-kinase.orobranchialRelating to the mouth and the gillsorobuccal(anatomy) Relating to the mouth and the cheekorocervical(anatomy) Relating to the mouth and the neckoroclinalRelating to an orocline.orodental(anatomy) Relating to the mouth and the teethorodigitofacialAlternative form of orofaciodigital.oroduodenalRelating to, or connecting the mouth and the duodenumoroesophageal(medicine) Of or relating to the mouth and the esophagus.orofacial(anatomy) Of or affecting both the mouth and face.orofaciodigital(pathology) Affecting the mouth, face, and digits.orofaecalAlternative form of orofecal.orofecal(medicine, of a disease) transmitted from feces to the mouth.orogastroduodenalRelating to the mouth, stomach and duodenumorogastrointestinalRelating to the mouth, stomach and intestines.orogenitalInvolving the mouth and the genitals.orographicalAlternative form of orographic.orohypopharyngeal(anatomy) Relating to the orohypopharynxorolabialRelating to the mouth and lips.orolaryngeal(anatomy) Relating to the mouth and the larynxorolingual(anatomy) Relating to the mouth and tongue.orological(obsolete, rare) Of or pertaining to orology.oromanualRelating to the mouth and the handsoromaxillofacial(anatomy) Relating to the mouth, jaw, and face.oromucosalRelating to, or directed towards the mucous surfaces of the mouth (cheek).oronasalOf or pertaining to the mouth and the noseoronasopharyngeal(anatomy) Relating to the oronasopharynxoropharyngeal(anatomy, relational) Of or pertaining to both the mouth and the pharynx.oropharyngoesophageal(medicine) Of or relating to the mouth, the pharynx and the esophagus.orotracheal(anatomy) Of or pertaining to the mouth and the tracheaorovaginaloral and vaginalorphenadolA combination of orphenadrine and paracetamolortataxelA particular drug used in chemotherapy.orteronelA non-steroidal antiandrogen that was investigated as a cancer treatment but later dropped.orthaxialthat has a straight vertebral axisorthelA kind of soil that shows little or no cryoturbation.orthobunyaviralRelating to orthobunyavirusesorthocentral(geometry) Relating to the orthocenter.orthodiagonal(mathematics, of a quadrilateral) Having diagonals that are perpendicular to each other.orthodiphenol(organic chemistry) Any diphenol in which the two hydroxyls are in the ortho positionorthodoxalArchaic form of orthodox.orthodoxicalDated form of orthodox.orthodromal(neurology) orthodromicorthodromicalMisspelling of orthodromic.orthoepicalSynonym of orthoepic.orthoepisticalorthoepisticorthofacial(surgery) Describing surgery to the bones of the face augmented by plastic surgery to the overlying tissueorthofluvialDescribing the area, next to a river, that is frequently floodedorthogonal(geometry) Of two objects, at right angles; perpendicular to each other.orthogonialAlternative form of orthogonal.orthographicalOf, or relating to orthography or spelling.orthohepadnaviralRelating to orthohepadnavirusesorthohexagonal(of a crystal) Having orthorhombic hexagonal symmetryorthokeratologicalRelating to orthokeratology.orthologicalRelating to orthologyorthomyxoviralRelating to the orthomyxoviruses.orthonasal(of odours) Perceived via the front of the nose (by sniffing)orthonormal(functional analysis, geometry, linear algebra) Of a set of vectors, both orthogonal and normalized.orthopaedicalPertaining to orthopaedics; characteristic of orthopaedia.orthopalinalMoved backwards and forwards in a straight lineorthopedagogicalRelating to orthopedagogyorthopedal(mathematics) Orthogonal to the foot of a geometric figure.orthopedical(American spelling) Alternative form of orthopaedical.orthophenylphenol(organic chemistry) A biocide used as a preservative, consisting chemically of two linked benzene rings and a phenolic hydroxyl group.orthopoxviralOf or relating to orthopoxviruses.orthopraxicalorthopracticorthopterologicalRelating to orthopterology.orthoradial(mathematics) Relative to a grid of circles surrounding a point and lines starting at that point; such a graph has alternate circular and radial componentsorthoreoviralRelating to the orthoreovirusesorthoretroviralRelating to orthoretrovirusesorthorhombicalAlternative form of orthorhombic.orthosexual(rare) Relating to or having the orthodox form of sexuality in a particular culture.orthosymmetricalorthosymmetricorthotetrahedralRelating to, or having the form of, an orthotetrahedron.orthotopicalAlternative form of orthotopic.orthotypographicalOf or relating to orthotypography.ortolA particular chemical used as a photographic developer.orvalA sage, of species Salvia viridis.oryallObsolete form of oriel.oryctognostical(obsolete) Relating to oryctognosy.oryctographicalAlternative form of oryctographic.oryctological(obsolete) Of or pertaining to oryctology.oryzanolAn antioxidant found in rice bran oil.oscillationalRelating to oscillation.oseophagealMisspelling of oesophageal.osmaterialAlternative form of osmeterial.osmeterialRelating to the osmeterium.osmolAlternative form of osmole.osmolalOf or pertaining to osmolality.osmolyticalAlternative form of osmolytic.osmomechanicalDescribing a mechanical action or force caused by osmotic pressureosmometricalAlternative form of osmometric.osmophysiologicalRelating to osmotic pressure and physiologyosphradial(zoology) Of or relating to the osphradium.osphresiologicalRelating to osphresiology.ostechondralAlternative form of osteochondral.osteoarchaeologicalRelating to osteoarchaeology.osteoarcheologicalAlternative form of osteoarchaeological.osteobiographicalOf or relating to osteobiography.osteochondral(anatomy) Pertaining to bone and cartilage.osteochondromalRelating to osteochondroma.osteochrondralMisspelling of osteochondral.osteocranial(anatomy) Relating to the osteocraniumosteodermalRelating to osteodermsosteofascial(anatomy) Relating to bone and fascia.osteohistologicalof or relating to osteohistologyosteoimmunologicalRelating to osteoimmunology.osteologicalOf or relating to osteology.osteomeatalMisspelling of ostiomeatal.osteometricalAlternative form of osteometric.osteomorphologicalRelating to osteomorphologyosteonalOf or pertaining to osteonosteopathologicalRelating to osteopathology.osteoperiosteal(anatomy) Relating to both bone and its periosteumosteoskeletal(anatomy) Relating to the bones of the skeletonostholAn O-methylated coumarin and calcium channel blocker found in plants such as Cnidium monnieri, Angelica archangelica, and Angelica pubescens.ostial(anatomy) Relating to any orifice, or ostium.ostiomeatal(anatomy) Relating to, or connecting the ostium and the meatusostracodologicalOf or relating to ostracodology.ostreaculturalRelating to ostreaculture.ostreiculturalRelating to ostreiculture.ostruthol(organic chemistry) A coumarin found in the plant Angelica archangelica.ostryopsitrienolA cyclic diarylheptanoid found in the plant Ostryopsis nobilis.ostryopsitriolA cyclic diarylheptanoid found in the plant Ostryopsis nobilis.otemellObsolete form of oatmeal.otherdimensional(science fiction) From or in another dimension (another plane or parallel universe).oticooccipitalRelating to the ear and the occiput (or the occipital bone)otmealObsolete form of oatmeal.otoacousticalSynonym of otoacoustic.otoccipital(anatomy) Relating to the ear and the occiput.otoconialOf or pertaining to an otoconium.otocranial(anatomy, archaic) Of or pertaining to the otocrane.otofaciocervical(anatomy) Relating to the ears, face and neckotolaryngealRelating to the ear and the larynxotolaryngologicalPertaining to otolaryngology.otologicalOf or pertaining to otology.otonal(music) Exhibiting or relating to an otonality.otoneurologicalAlternative form of otoneurologic.otooccipitalAlternative spelling of otoccipital.otopalatodigital(anatomy) Relating to the ear, palate and fingers, but typically describing a dysplasia that affects these and other parts of the bodyotopathologicalRelating to otopathologyotorhinolaryngeal(anatomy) otolaryngealotorhinolaryngologicalOf or pertaining to otorhinolaryngology.otorhinologicalRelating to otorhinologyotosphenal(anatomy, dated) basioccipitalotosphenoidalRelating to the ear and the sphenoid boneotospondylomegaepiphyseal(pathology, anatomy) Relating to a rare inherited skeletal and auditory disorder characterized by abnormalities of the ears, spine, and enlarged epiphyses of long bones (megaepiphyseal changes), typically resulting in hearing loss, skeletal malformations, and short stature.otosteal(anatomy) An auditory ossicle.otosurgical(surgery) Relating to otosurgery.ototopical(medicine) Topical in the ear region, such as the ear canal.oul(Ireland, Mid-Ulster) Alternative form of ould.ouncil(Ireland, obsolete) Scales for weighing produce at a marketouselAlternative form of ouzel.outbawl(transitive) To bawl louder or longer than.outbowl(transitive) To beat at bowling.outbrawl(transitive) To surpass in brawling.outcallA visit by a provider of some service, such as a massage therapist or a prostitute, to a client.outcarol(transitive) To surpass in carolling; to sing more or better than.outcool(transitive) To surpass in cool; to be more cool (hip, fashionable, etc.) than.outcrawl(transitive) To crawl faster or farther than.outcurl(intransitive, poetic) To curl outward.outdevil(transitive) To surpass in devilry.outduel(transitive) To duel better than (someone else).outdwell(transitive, obsolete) To dwell or stay beyond; to outstayoutershell(rare) A protective cover or layer (especially referring to an item of clothing).outfall(transitive, obsolete) To burst forth, as upon an enemy; make a sally.outfeel(transitive) To feel more accurately or more acutely than.outfellsimple past of outfalloutfool(transitive) to be more foolish than.outgeneral(transitive) To outdo or surpass (someone) in military skill or leadership.outhaul(transitive) To haul out.outhowl(transitive) To howl louder or longer than.outhurl(transitive) To surpass in hurling or throwing.outintellectual(transitive, rare) to surpass (someone) in being intellectualoutmarvel(transitive) To surpass in marvellousness.outmetal(transitive) To surpass (an enemy etc.) in terms of firepower.outparcelA plot of land in a commercial shopping center development reserved for the later construction of smaller buildings, often restaurants.outpeal(transitive) To surpass in pealing; to peal louder than.outpoll(transitive) To defeat in a poll.outpull(transitive) To surpass in pulling.outrival(transitive) To outperform; to outdo.outrollTo roll outward; to unroll or unfold with a rolling motion.outsail(transitive) To sail faster or further than.outsell(transitive, stative) To sell more than; to surpass in sales.outshrill(transitive) To surpass in shrilling; to cry louder than.outskill(transitive) To surpass in skill.outsmell(transitive) To smell more acutely than.outspell(transitive) To spell better than.outsteal(transitive) To surpass in stealing; to steal more than.outswell(transitive, obsolete) To exceed in swelling.outtell(transitive) To surpass in telling, counting, or reckoning.outtravel(transitive) To travel more or greater thanoutwallAn exterior or outer wall.outwell(archaic, ambitransitive) To well outward; to issue forth.outwhirl(rare, transitive) To surpass in whirling or spinning.outwill(transitive) To surpass in force of will.outwittalThe act of outwitting somebody.outyell(transitive) To yell more loudly than.ouzel(now regional) A Eurasian blackbird (Turdus merula).ovalAn elongated round shape resembling an ellipse or an egg.ovalenyl(organic chemistry) A univalent radical derived from ovaleneovangkolThe dense wood of the African evergreen tree Guibourtia ehie.ovarial(dated) Relating to the ovaries; ovarian.ovationalOf or relating to ovation.ovenfulAs much as an oven will hold.overallAll-encompassing, all around.overanalyticalTending to overanalyze.overappraisalAn appraisal that overvalues something.overarousalexcessive arousaloverartificialExcessively artificial.overawful(obsolete) Excessively awful (awe-inspiring or reverential).overbashfulExcessively bashful.overbill(transitive) To bill an excessive amount, particularly an amount greater than one is legally entitled to.overboastfulExcessively boastful.overboil(ambitransitive) To boil excessively.overbrimful(rare) Overbrimming; overfull; full to overflowing.overbroilTo broil excessively.overbrutalExcessively brutal.overcall(poker, bridge) To call a bet after another player has already calledovercancelTo cancel too many or too forcefully.overcarefulExcessively careful.overcasualExcessively casual.overcerebralExcessively cerebral.overcheerfulExcessively cheerful.overchill(transitive) To chill too much.overcivilExcessively civil.overcoilPart of a watch: an improved balance spring with a raised outer coil.overcommitalAlternative spelling of overcommittal.overcommittal(rare) overcommitmentovercontrol(transitive) To control to too great a degree.overcoolExcessively cool; chilly.overcriticalExcessively critical.overcrueloverly or excessively cruelovercullTo cull excessively.overculturalOf or pertaining to an overculture.overdealTo have too many dealings.overdispersaldispersal too widelyoverellipticalToo elliptical.overemotionalShowing too much emotion.overfallA turbulent section of a body of water, caused by strong currents passing over submerged ridges.overfancifulExcessively fanciful.overfeelTo feel excessively or to too great an extent.overfillTo fill beyond capacity or beyond what is appropriate.overforcefulWith excessive force.overformalExcessively formal.overfoul(transitive) To foul excessively.overfrailExcessively frail.overfruitfulExcessively fruitful.overfulObsolete spelling of overfull.overfulfilAlternative form of overfulfill.overfulfill(transitive) To do or provide more than is needed to fulfill (a quota etc.).overfullexcessively filled; full to overflowingovergeneralExcessively generalovergenialExcessively genial.overgratefulExcessively grateful.overhailTo praise too much.overhallObsolete form of overhaul.overhaulA major repair, renovation, or revision.overheal(intransitive) To heal over.overhelpfulExcessively helpful.overhystericalExcessively hysterical.overinfluentialToo influential.overintellectualExcessively intellectual.overjoyfulExcessively joyful.overkill(literally, military) A destructive capacity that exceeds that needed to destroy an enemy; especially with nuclear weapons.overlevel(video games) In role-playing and similar games, to attain a higher experience level than appropriate for a given battle or task.overliteralExcessively literal.overlogicalExcessively logical; adhering too closely to logic.overloyalExcessively loyal.overmantelA decorative structure, usually plasterwork or carved wood, and sometimes containing a mirror, over a mantelpiece.overmasterful(rare) Overly masterful; having excessive mastery.overmercifulExcessively merciful.overmournfulExcessively mournful.overnutritionalRelating to overnutritionoveroil(transitive) To oil too much.overpainfulExcessively painful.overpartialBeing overly partial; unduly partial.overpedal(music, intransitive) To overuse the sustaining pedal of a piano, causing the notes to sound too loud.overpeel(transitive) To peel too much off.overphilosophicalExcessively philosophical.overplayfulexcessively playfuloverplentifulExcessively plentiful.overpolemicalExcessively polemical.overpotential(physics) The difference between the electric potential of an electrode or cell under the passage of a current and the thermodynamic value of the electrode or cell potential in the absence of electrolysis.overpowerfulExcessively powerful.overproportionalRelating to overproportionoverpull(engineering) The driver for a pump that has the eccentrics above or beside the gear wheel.overquell(transitive) To quell or subdue completely; gain or have power over.overrationalExcessively rational.overrespectfulExcessively respectful.oversail(transitive, architecture) To project from a structure above (something); to overhang.overscepticalAlternative form of overskeptical.overschoolTo school to excess; to give too much training.overscrawl(transitive) To scrawl over.overscroll(graphical user interface) To perform this kind of scrolling and bouncing effect.overseal(transitive) To close with a seal at the top.oversell(transitive) To agree to sell more of something than one can supply.oversensationalexcessively sensationaloversentimentalExcessively sentimental.oversignalTo signal excessively.overskepticalExcessively skeptical.oversmallExcessively small.oversoul(philosophy, especially in transcendentalism) A supreme reality or mind; the spiritual unity of all being.overspellTo make spelling mistakes by adding extra letters.overspillThat which spills over.overstressfulExcessively stressful.overswell(ambitransitive) To swell or rise above (something, especially the rim of a container, the sides of something hollow, etc.).overswirl(transitive) To swirl excessively.overtechnicalExcessively technical.overtell(transitive) To exaggerate or be more explicit than needed; tell too much or too often, etc.overtheatricalExcessively theatrical.overthoughtfulToo thoughtful or pensive.overthrowalThe act of overthrowing something or someone.overtill(ambitransitive, agriculture) To till too much.overtoil(transitive) To weary (someone or something) excessively; to exhaust or tire out by working too much.overtravel(computing) The distance a pressed switch on a keyboard continues to move after its actuation.overtrustfulExcessively trustful.overtruthfulExcessively truthful.overveil(transitive) To veil or cover.overyouthfulExcessively youthful.overzealExcessive zeal.ovicell(zoology) One of the dilatations of the body wall of Bryozoa in which the ova sometimes undergo the first stages of their developmentovicidalHaving the ability to kill an ovumoviducal(anatomy) Of or pertaining to oviducts.oviductalOf, pertaining to, or occurring in the oviduct.ovipositionalRelated to, or by means of, ovipositionovococcalRelating to ovococciovocylindricalcylindrical but with an oval rather than circular cross sectionovoidalsomewhat ovoidovological(obsolete) Of or relating to ovology.ovothiol(organic chemistry) Any of a group of antioxidant mercaptohistidines found in the eggs of some marine invertebratesovulationalRelating to ovulation.owel(law, obsolete) equalowl(by extension) A person seen as having owl-like characteristics, especially appearing wise or serious, or being nocturnally active.owlful(literary) Full of owls.oxaceprolA particular kind of anti-inflammatory drug that is used to treat osteoarthritis.oxadiazol(organic chemistry, especially in combination) Any univalent radical derived from an oxadiazoleoxadixylA particular fungicide.oxalyl(organic chemistry, especially in combination) Either the univalent or the divalent radicals derived from oxalic acid by removal of one or two hydrogen atomsoxamyl(organic chemistry) The pesticide methyl 2-(dimethylamino)-N-[(methylcarbamoyl)oxy]-2-oxoethanimidothioateoxanol(organic chemistry) The alcohol tetrahydro-2H-pyran-2-ol derived from tetrahydropyranoxanorbornenyl(organic chemistry, especially in combination) A radical derived from oxanorborneneoxantelA particular kind of anthelmintic that is used to cure intestinal parasites.oxathiadiazol(organic chemistry, especially in combination) Any univalent radical derived from an oxathiadiazoleoxazolyl(organic chemistry, especially in combination) A radical derived from an oxazoleoxetanyl(organic chemistry, especially in combination) A univalent radical derived from oxetaneoxidaniumyl(physics, chemistry) The cation H₂O⁺, present in interstellar space, formed by removal of an electron from a water moleculeoxidationalRelating to oxidation.oxindolArchaic form of oxindole.oxipurinolAlternative form of oxypurinol.oxisolA soil type, containing at all depths no more than ten percent weatherable minerals, and low cation exchange capacity. They are always red or yellowish and best known for their occurrence in tropical rainforest.oxoalkyl(organic chemistry, especially in combination) Any alkyl group in which a methylene group has been replaced by a carbonyl group.oxocholesterol(organic chemistry) Any derivative of cholesterol in which a methylene group has been replaced by a carbonyl groupoxocrinol(organic chemistry) A linear terpenoid derived from the seaweed Cystoseira crinita, 12-hydroxy-6,10-dimethyldodeca-6,10-dien-2-oneoxocyclohexyl(organic chemistry, especially in combination) A univalent radical derived from cyclohexanoneoxoethyl(organic chemistry, especially in combination) Any radical formed by substitution of an oxygen atom (as a carbonyl group) for two hydrogen atoms of an ethyl radicaloxoferryl(inorganic chemistry) Relating to high-valent iron ions directly bonded to oxygenoxonolAny of a series of fluorescent dyes that have two or more oxazol ringsoxononenal(organic chemistry) Any ketone derivative of nonenal (in which a methylene group is converted to a carbonyl group) but especially 4-oxononenal formed by oxidation of polyunsaturated fatty acidsoxopentanal(organic chemistry) Any ketoaldehyde derived from pentanaloxozeaenol(organic chemistry) The resorcylic lactone (3S,5Z,8S,9S,11E)-3,4,9,10-tetrahydro-8,9,16-trihydroxy-14-methoxy-3-methyl-1H-2-benzoxacyclotetradecin-1,7(8H)-dioneoxprenololA lipophilic beta blocker.oxtailThe tail of an ox or cow.oxyallyl(organic chemistry) The diradical, CH₂=C(-O⁻)-C⁺₂.oxyferryl(chemistry, especially in combination) A radical containing ferryl iron and an oxygen atom Feᴵⱽ-O; found especially in forms of hemeoxyfuelA combination of fuel and oxygen, especially when used in welding etc.oxygal(obsolete) Sour milk.oxyl(chemistry) A compound or radical bound to an oxygen by a single bondoxymel(historical, medicine) A mixture of honey, water, and vinegar, boiled to a syrup, sometimes mixed with herbs or spices.oxypendylA particular antiemetic and antipsychotic.oxyphenol(chemistry) A phenol produced by the distillation of catechin; oxyphenic acid or pyrocatechin.oxypurinolAn inhibitor of xanthine oxidase.oxyquinaseptolSynonym of diaphtherin.oxyradical(chemistry) Any of a group of radicals containing reactive oxygen atoms.oxyresveratrolA stilbenoid and tyrosinase inhibitor, found in the heartwood of Artocarpus lakoocha.oxysteelSteel produced by reduction of iron oxides by carbon.oxysterol(organic chemistry) Any of several oxidized derivatives of sterolsoxythermal(ecology, of a water environment) warm and rich in oxygenoxytonical(linguistics) oxytoneoxyuricidalDestructive to worms of the genus Oxyuris, or pinworms.oyamelAbies religiosa, the sacred fir, an evergreen coniferous tree of South America with needle-like leaves.oylObsolete spelling of oil.oystershellThe shell of an oyster.ozagrel(pharmacology) An antiplatelet agent that works as a thromboxane A2 synthesis inhibitor.