UNIVALVE

univalve. Univalve, [u as yu] n. an animal with one shell

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U″ni‐valve (?), n. [[Uni- + valve: cf. F. univalve.]] (Zoöl.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs. ☞ 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.