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Noun bivalvia has 1 sense
Bivalvia, class Bivalvia, Lamellibranchia, class Lamellibranchia, class Pelecypoda - oysters; clams; scallops; mussels--1 is a kind of class
 --1 is a member of Mollusca, phylum Mollusca
 --1 has members:
 |  | bivalve, pelecypod, lamellibranch; spat; Myaceae, order Myaceae; Tridacnidae, family Tridacnidae; Cardiidae, family Cardiidae; Ostreidae, family Ostreidae; Pteriidae, family Pteriidae; Anomiidae, family Anomiidae; Placuna, genus Placuna; Arcidae, family Arcidae; Mytilidae, family Mytilidae; Unionidae, family Unionidae; Pectinidae, family Pectinidae; Teredinidae, family Teredinidae; Pholadidae, family Pholadidae | 
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