univalve adjective & noun.
['ju:nɪvalv] M17.[from UNI- + VALVE noun.]A. adjective. Chiefly
Zoology. Having one valve or part;
spec. (of a mollusc) having a shell in one piece.
M17.b. noun.
Zoology. A univalve mollusc, esp. one of the class Gastropoda.
M17. [TahlilGaran] English Dictionary ▲