bivalvular
21two-valved — a. Bivalve, bivalvular …
22bivalve — /ˈbaɪvælv / (say buyvalv) –noun 1. Zoology a mollusc having two shells hinged together, as the oyster, clam, mussel; lamellibranch. –adjective 2. Botany having two valves, as a seed case. 3. Zoology having two shells, usually united by a hinge.… …
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