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.
⇒ 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.
© Webster 1913.
U"ni*valve (?), U"ni*valved (?), a. [Cf. F. univalve.] Bot. & Zool.
Having one valve; as, a univalve shell or pericarp.
© Webster 1913.