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| Noun | 1. |  class Pelecypoda - oysters; clams; scallops; mussels Mollusca, phylum Mollusca - gastropods; bivalves; cephalopods; chitons bivalve, lamellibranch, pelecypod - marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together spat - a young oyster or other bivalve Myaceae, order Myaceae - clams family Tridacnidae, Tridacnidae - large marine hard-shell clams Cardiidae, family Cardiidae - somewhat heart-shaped sand-burrowing bivalve mollusks family Ostreidae, Ostreidae - oysters family Pteriidae, Pteriidae - pearl oysters Anomiidae, family Anomiidae - saddle oysters genus Placuna, Placuna - windowpane oysters Arcidae, family Arcidae - ark shells family Mytilidae, Mytilidae - marine mussels family Unionidae, Unionidae - freshwater mussels found worldwide family Pectinidae, Pectinidae - scallops family Teredinidae, Teredinidae - shipworms family Pholadidae, Pholadidae - a family of Bivalvia class - (biology) a taxonomic group containing one or more orders |
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