Univalve

U´ni`valve

n.	1.	(Zool.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs.
a.	1.	(Bot. & Zool.) Having one valve; as, a univalve shell or pericarp.

Noun	1.	univalve - a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes Synonyms: gastropod
Adj.	1.	univalve - used of mollusks, especially gastropods, as snails etc. Antonyms: bivalve, bivalved - used of mollusks having two shells (as clams etc.)