Hip"pu*rite (?), n. [Gr. ? decked
with a horse's tail; "i`ppos horse + ? tail: cf. F.
hippurite.] (Paleon.) A fossil bivalve mollusk of
the genus Hippurites, of many species, having a conical, cup-
shaped under valve, with a flattish upper valve or lid. Hippurites
are found only in the Cretaceous rocks.