Trigonia

Webster's Dictionary of the English Language

·noun 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.

Related Words

trigonia
n. a bivalve marine mollusc with anacreous interior, much admired in Tasmania and used forpendants ...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris