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univalve a. 单瓣的,单壳的
n. 单壳软体动物 单瓣的,单壳的单壳软体动物 univalve adj 1: used of mollusks, especially gastropods, as snails etc. [ant: {bivalve}, {bivalved}] n 1: a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes [synonym: {gastropod}, {univalve}] Univalve \U"ni*valve\, Univalved \U"ni*valved\, a. [Cf. F.
univalve.] (Bot. & Zool.) Having one valve; as, a univalve shell or pericarp. [1913 Webster] Univalve \U"ni*valve\, 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] Note: 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] Univalve
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