Bivalve

also called lamellibranch. zoology. any mollusk, as the oyster, clam, scallop, or mussel, of the cl-ss bivalvia, having two sh-lls hinged together, a soft body, and lamellate gills.
botany. having two valves, as a seedcase.
zoology. having two sh-lls, usually united by a hinge.
having two similar parts hinged together.
historical examples

encyclopaedia britannica, 11th edition, volume 16, slice 6 various
the sailor’s word-book william henry smyth
the sea sh-r- william s. furneaux
on the genesis of species st. george mivart
a breeze from the woods, 2nd ed. william chauncey bartlett
a conchological manual george brettingham sowerby
chambers’s twentieth century dictionary (part 1 of 4: a-d) various
a conchological manual george brettingham sowerby
the new gresham encyclopedia various
lachesis lapponica carl von linn

noun
also pelecypod, lamellibranch. any marine or freshwater mollusc of the cl-ss pelecypoda (formerly bivalvia or lamellibranchia), having a laterally compressed body, a sh-ll consisting of two hinged valves, and gills for respiration. the group includes clams, c-ckles, oysters, and mussels
adjective
also pelecypod, lamellibranch. of, relating to, or belonging to the pelecypoda
(biology) also bivalvate (baɪˈvælveɪt). having or consisting of two valves or similar parts: a bivalve seed capsule
adj.
bivalve
(bī’vālv’)
any of various mollusks of the cl-ss bivalvia, having a sh-ll consisting of two halves hinged together. clams, oysters, scallops, and mussels are bivalves. the cl-ss bivalvia is also called pelecypoda, and was formerly called lamellibranchia. compare univalve.