ostracoderm
— Noun
– English
～ extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
order Ostracodermi
— Noun
– English
～ extinct group of armored jawless vertebrates; taxonomy is not clear
Ostracodermi
— Noun
– English
～ extinct group of armored jawless vertebrates; taxonomy is not clear
ostrava
— Noun
– English
～ an industrial city in northwestern Czech Republic in the Moravian lowlands; located in the coal mining area of Silesia
Ostrea gigas
— Noun
– English
～ a large oyster native to Japan and introduced along the Pacific coast of the United States; a candidate for introduction in Chesapeake Bay
ostrea
— Noun
– English
～ type genus of the family Ostreidae
ostrich
— Noun
– English
～ fast-running African flightless bird with two-toed feet; largest living bird
ostrich fern
— Noun
– English
～ tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes
ostrich
— Noun
– English
～ a person who refuses to face reality or recognize the truth (a reference to the popular notion that the ostrich hides from danger by burying its head in the sand)
Ostrogoth
— Noun
– English
～ a member of the eastern group of Goths who created a kingdom in northern Italy around 500 AD
Ostrya carpinifolia
— Noun
– English
～ medium-sized hop hornbeam of southern Europe and Asia Minor
Ostrya
— Noun
– English
～ deciduous monoecious trees of Europe and Asia and America; sometimes placed in subfamily or family Carpinaceae
Ostryopsis
— Noun
– English
～ deciduous monoecious shrubs of China and Mongolia resembling trees of the genus Ostrya; sometimes placed in subfamily or family Carpinaceae
Ostwald
— Noun
– English
～ German chemist (1853-1932)
Ostyak
— Noun
– English
～ a Ugric language (related to Hungarian) spoken by the Ostyak
Ostyak
— Noun
– English
～ a member of the nomadic Ugrian people living in northwestern Siberia (east of the Urals)
Oswald
— Noun
– English
～ United States assassin of President John F. Kennedy (1939-1963)
Otaheite arrowroot
— Noun
– English
～ a starch obtained from the root of the pia
otalgia
— Noun
– English
～ an ache localized in the middle or inner ear