Ostrea

·noun A genus of bivalve Mollusca which includes the true oysters.

ostrea
ostrĕa, ae, f., and (rarely) ostrĕum, i, n., = ὄστρεον, I an oyster , mussel , sea-snail (class.)...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
ostrea
ostrea ae, f plur.ae, ārum, f (C.), and a, ōrum, n (H., O., Iu.), ὄστρεσν, an oyster, mussel. ...

An Elementary Latin Dictionary