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Definition of ostracod


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os·tra·cod  audio  (str-kd) KEY 

NOUN:
Any of various minute, chiefly freshwater crustaceans of the subclass Ostracoda, having a bivalve carapace.

ETYMOLOGY:
New Latin Ostracda, subclass name, from Greek ostrakds, testaceous, from ostrakon, shell; see ost- in Indo-European roots


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