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Webster 1913 Edition

Univalve

U′ni-valve

,
Noun.
[
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 1828 Edition

Univalve

U'NIVALVE

,
Adj.
[L. unus, one, and valve.] Having one valve only, as a shell or pericarp.

U'NIVALVE

,
Noun.
A shell having one valve only. The univalves form one of the three divisions into which shells are usually divided.

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