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All 82 Matching Words

oarsmanA person who rows a boat, either alone or with others.oarsmenplural of oarsmanobelion(anatomy) A craniometric point on the sagittal suture between the parietal foramina near the lambdoid suture.obtusin(organic chemistry) A bromine-containing polycyclic ketal found in the marine alga Laurencia obtusa.octagon(geometry, also attributively) A polygon with eight sides and eight angles.octavin(music) A single-reed instrument with a conical bore, originating in Germany.octogenThe explosive HMXoctogonObsolete form of octagon.odalman(historical) A man having odal, or able to share in it by inheritance.odderon(physics) The hypothetical counterpart of the pomeron, carrying odd charge parity.oddsmanA person who offers odds to gamblers.oegipanAlternative form of aegipan.oestrin(biochemistry, now rare) An oestrogen, specifically oestrone.offspinAlternative form of off spin.ogtiern(Scotland, historical) The person who is fourth in the line of descent from a thane.oilbeanAn African tree, Pentaclethra macrophylla.oildown(car racing) An oil spill sufficiently serious as to require the use of mechanical equipment to clean it up.oilskinCloth made from cotton and treated with oil and pigment to make it waterproof.olachenAlternative form of eulachon.olation(inorganic chemistry) The process by which metal ions form polymeric oxides in aqueous solution.oldtown(nonstandard, very rare) Alternative form of old town.oleamen(medicine, obsolete) A soft ointment prepared from oil.oleosinA kind of structural protein found in vascular plant oil bodies and in plant cells.omentin(biochemistry) Any of a family of secretory proteins expressed predominantly in visceral adipose tissue.omicron(virology, pathology) Ellipsis of Omicron variant.omikronAlternative form of omicron.ommatinA simple ommochromeoncogenAny agent that causes tumors.oncovin(medicine) vincristineoolakanAlternative form of eulachon.oolicanAlternative form of eulachon.ootaxon(taxonomy) Any taxonomic classification of egg fossilsopaquen(ambitransitive, rare) To make or become opaque.ophaninA toxin present in the venom of the king cobra Ophiophagus hannahophryon(anatomy) The point in the brow just above the optic foramen, or eyesocket, and glabella.opinionThe judgment or sentiment which the mind forms of persons or things; estimation.oppidan(also Oppidan) A class of student in traditional English public schools such as Eton; opposed to colleger or King's Scholar.opsoninAny chemical produced by the body, including antibodies and complement proteins, that causes a pathogen to be more susceptible to phagocytosis.oraisonObsolete form of orison.orarian(archaic) Of or pertaining to a coast.orarionA deacon's stole in the Eastern Orthodox Church.orationA formal, often ceremonial speech.orbiton(particle physics) A quasiparticle, corresponding to the orbital energy of an electron, which can result from an electron apparently ‘splitting’ under certain conditions.organonA set of principles that are used in science or philosophy.orillonA semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, found in old fortresses.oroidin(organic chemistry) Any of a family of alkaloids derived from marine spongesorthianDenoting a type of singing at a very high pitch.ortolanA small European migratory bunting (Emberiza hortulana), once eaten whole as a delicacy.ortygan(obsolete) Any of various buttonquails.oryzeinMisspelling of oryzenin.osladinA particular steroid glycoside.osmotin(biochemistry) An antifungal protein that provides protection from osmotic stressostikan(historical) Any of the Arab governors of Armenia.ottoman(furniture) An upholstered sofa, without arms or a back, sometimes with a compartment for storing linen etc.otubain(biochemistry) Any of a family of proteases associated with ovarian tumoursouabainA poisonous cardiac glycoside, g-strophanthin, found in the seeds of certain lianas.oulakanAlternative form of eulachon.outbornMoved, carried, or expressed outwardly.outburn(intransitive) To burn away; be consumed by fire.outearn(transitive) To make more money than, to earn more than.outfawn(transitive, rare) To exceed in fawning.outgain(transitive) To outperform on a quantitative measurement.outgrin(transitive) To surpass in grinning.outlean(intransitive, poetic) To lean outward.outlimn(transitive) To sketch out or delineate.outplan(transitive) To surpass in planning.outskinAn outer skin; surface.outspan(South Africa, transitive) To release oxen from a harness.outspin(transitive) To spin out; finish; exhaust.outturnAn amount produced during a specified period; output or turnoutoutwornpast participle of outwearovarian(medicine) Relating to the ovaries.ovation(Ancient Rome) A victory ceremony of less importance than a triumph.overmanA person who supervises others; a supervisor, especially in a mine.overransimple past of overrunoverrenObsolete form of overrun.overrun(transitive) To defeat an enemy and invade in great numbers, seizing the enemy positions conclusively.overtan(transitive, intransitive) To tan excessively.overwin(transitive, UK dialectal) To overcome; gain one's point; exceed.oxdrawnDrawn or pulled by oxen.oxoironA hypervalent form of iron formed by binding with an oxygen atomoxonian(mineralogy) Containing oxygen.