pelecypod

[puh-les-uh-pod]
noun
1.
any mollusk of the class Pelecypoda (Lamellibranchiata), characterized by a bivalve shell enclosing the headless body and lamellate gills, comprising the oysters, clams, mussels, and scallops.
adjective
2.
Also, pelecypodous [pel-uh-sip-uh-duhs] . belonging or pertaining to the Pelecypoda.

Origin:
1855–60; < Neo-Latin Pelecypoda < Greek péleky(s) hatchet + Neo-Latin -poda; see -pod

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World English Dictionary
pelecypod (pɪˈlɛsɪˌpɒd)
 
n, —adj
bivalve another word for bivalve
 
[C19: from Greek pelekus hatchet + -pod]

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Example sentences
The two shells of the pelecypod are identical in size and shape.
These have yet to be identified but appear to be pelecypod, coral, and
  gastropod fragments.
Chromosome number in nine families of marine pelecypod mollusks.
They formed under conditions that permitted the existence of an impoverished
  pelecypod fauna.
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