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.

&fist; 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.

{ U"ni*valve (?), U"ni*valved (?), } a. [Cf. F. univalve.] (Bot. & Zoöl.) Having one valve; as, a univalve shell or pericarp.

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.

&fist; 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.

{ U"ni*valve (?), U"ni*valved (?), } a. [Cf. F. univalve.] (Bot. & Zoöl.) Having one valve; as, a univalve shell or pericarp.