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Webster's New World College Dictionary » ostracod
ostracod
ostracod definition
os·tra·cod (äs′trə käd′)
noun
any of various classes (esp. Ostracoda) of small, freshwater or marine crustaceans, having a bivalve carapace that covers the entire body
Etymology: < ModL Ostracoda < Gr ostrakon: see ostracize
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