n. [ Uni- + valve: cf. F. univalve. ] (Zool.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs. [ 1913 Webster ]
☞ Most univalves are spiral and are the shells of gastropods, but many belong to cephalopods and pteropods. A large number of univalves belonging to the gastropods are conical, cup-shaped, or shieldlike, as the limpets. [ 1913 Webster ]
‖n. pl. [ NL. ] (Zool.) Same as Gastropoda. [ 1913 Webster ]
a. (Bot. & Zool.) Same as Univalve, a. [ 1913 Webster ]