- (of a bivalve mollusk) having the valves of the shell unequal in shape and size.
Origin of inequivalve
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for inequivalve
In the former, all the shells are inequivalve; in the latter equivalve.A Conchological Manual
George Brettingham Sowerby
A bivalve is said to be equivalve when the two shells composing it are of the same size, inequivalve when they are not.Sea-Weeds, Shells and Fossils
Asymmetrical, inequivalve, fixed, with extensive pallial sutures; no siphons.