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All 48 Matching Words

obpyriform(botany) Having a shape that is in outline like that of a pear, with the base at the narrower end.obreniform(botany, of leaves) Having a reverse reniform shape, with the petiole opposite the notch.obsoletismA disused word or phrase; an archaism.occhiolism(neologism, rare) The awareness of the small scope of one's own perspective and the way it limits one's ability to fully understand the world.occulariumAlternative form of ocularium.oceanariumA park where visitors can see marine mammals and/or fish.octadrachm(historical) An Ancient Greek coin having a value of eight drachmas.octamerismThe condition of being octamerousoctasodium(chemistry, in combination) Eight sodium atoms or cations in a moleculeoctetonium(physics) A color singlet bound state of color-octet scalars.odditoriumA shop or museum exhibiting unusual curiosities.odontogram(dentistry) A diagrammatic representation of a person's teethofficerismThe attitudes and behaviour of an officer.ommatidium(zoology) One of the conical substructures which make up the eyes of invertebrates with compound eyes.omnitheism(religion) The belief that all religions contain a core recognition of the same god or gods.omomyiformAny primate of the infraorder Omomyiformesomosternum(anatomy) In many mammals, an interarticular cartilage, or bone, between the sternum and the clavicle.onisciform(of an insect larva) flattened and broad in formontologism(philosophy) An ideological system which maintains that God and divine ideas are the first object of our intelligence and the intuition of God's existence the first act of our intellect.opprobrium(countable, archaic) A cause, object, or situation of disgrace or shame.optimalism(philosophy) The doctrine that this universe exists because it is better than the alternatives.orangewormA snout moth of the genus Amyelois that is a pest to some commercial cropsordinalismThe state or quality of being ordinal.organicism(medicine, historical) The theory that disease is a result of structural alteration of organs.organigram(management) A graphical representation of the structure of an organization, showing groups and departments and their interconnections and linked responsibilities.organogram(management) Alternative spelling of organigram.orichalcumA valuable yellow metal known to the Ancient Greeks and Romans; now sometimes interpreted as referring to a natural alloy of gold and copper, and sometimes treated as a mythical substance.ormetoprim(pharmacology) A dihydrofolate reductase inhibitor.ornithonymThe common name of a (species of) bird.osmateriumAlternative form of osmeterium.osmeriformOf the order Osmeriformes of ray-finned fish, characterised by having the maxilla in the gape of the mouth, radii absent from the scales, and loss of the basisphenoid and orbitosphenoid bones.osmeterium(zoology) One of a pair of scent organs in the larvae of certain swallowtail butterflies.osmiridium(mineralogy) A hard, corrosion-resistant alloy of osmium and iridium, used in pen nibs.osphradium(zoology, anatomy) a sensory organ in certain molluscs, whose main function is believed to test incoming water for silt and other possible food particles.ossilegiumThe collection of the bones of a dead person, after decomposition of the soft tissue, for placement in an ossuaryostreiformResembling an oysterostrichismThe act of hiding, often unsuccessfully, by ducking one's head out of view.outblossomTo blossom more beautifully than, or with more flowers than.outperform(transitive) To perform better than something or someone.outprogram(transitive) To surpass in computer programming ability.ouvrierism(communism) The glorification of manual laborers, often in opposition to the leadership of labor or socialist movements.overesteem(transitive) To esteem too much.overinform(transitive) To provide with too much information.overstreamTo stream or flow over.oxammonium(inorganic chemistry) The cation HO-NH₃⁺oxiracetamA nootropic drug of the racetam family.oxorhenium(inorganic chemistry, often in combination) A rhenium and oxygen atom bound together as part of a larger ion or complexoxycalcium(dated) Of, pertaining to, or produced by a combination of calcium (or lime) and oxygen