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- an aquatic mollusc which has a compressed body enclosed within two hinged shells, such as oysters, mussels, and scallops双壳类动物。亦称PELECYPOD或LAMELLIBRANCH.
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- Class Bivalvia (formerly Pelecypoda or Lamellibranchia).双壳纲（原属斧足纲或瓣鳃纲）。
(亦作bivalved)
1- (of a mollusc or other aquatic invertebrate) having a hinged double shell有双壳的。
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- Botany having two valves【植】有双瓣的。