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Glossary · Nouns · O

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TermTypeDefinitionClassificationsUpdated
Oyster PlantnounMWEMediterranean biennial herb with long-stemmed heads of purple ray flowers and milky sap and long edible rootverifiedMay 18, 2026
Oyster ShellnounMWEa shell of an oysterverifiedMay 18, 2026
Oyster StewnounMWEoysters in creamverifiedMay 18, 2026
Oyster StuffingnounMWEstuffing made with oystersverifiedMay 18, 2026
Oystercatchernounblack-and-white shorebird with stout legs and billverifiedMay 18, 2026
Oysters RockefellernounMWEoysters spread with butter and spinach and seasonings and baked on the half shellverifiedMay 18, 2026
Oz.nouna unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 gramsverifiedMay 18, 2026
Ozaenanouna chronic disease of the nose characterized by a foul-smelling nasal discharge and atrophy of nasal structuresverifiedMay 18, 2026
Ozark HarpnounMWEa small lyre-shaped musical instrument that is placed between the teeth and played by twanging a wire tongue while changing the shape of the mouth cavityverifiedMay 18, 2026
Ozenanouna chronic disease of the nose characterized by a foul-smelling nasal discharge and atrophy of nasal structuresverifiedMay 18, 2026
Ozoceritenouna waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleumverifiedMay 18, 2026
Ozokeritenouna waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleumverifiedMay 18, 2026
Ozonenouna colorless gas (O3) soluble in alkalis and cold waterverifiedMay 18, 2026
Ozone HolenounMWEan area of the ozone layer (near the poles) that is seasonally depleted of ozoneverifiedMay 18, 2026
Ozone LayernounMWEa layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sunverifiedMay 18, 2026
Ozone SicknessnounMWEillness that can occur to persons exposed to ozone in high-altitude aircraftverifiedMay 18, 2026
Ozonidenounany of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compoundverifiedMay 18, 2026
Ozonospherenouna layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sunverifiedMay 18, 2026