( n. )
A genus of pearly bivalve shells, numerous extinct species of which are characteristic of the Mesozoic rocks. A few living species exist on the coast of Australia.
( n. )
A genus of pearly bivalve shells, numerous extinct species of which are characteristic of the Mesozoic rocks. A few living species exist on the coast of Australia.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012