Ostracod definitions

-kōd'
Any of numerous small chiefly aquatic crustaceans of the class Ostracoda, having a bivalve carapace and including many extinct species that are commonly found as fossils.
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Any of various classes (esp. Ostracoda) of small, freshwater or marine crustaceans, having a bivalve carapace that covers the entire body.
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Any of many small crustaceans, of the class Ostracoda, that resemble a shrimp enclosed in a bivalve shell.
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Origin of ostracod

New Latin Ostracōda subclass name from Greek ostrakōdēs testaceous from ostrakon shell ost- in Indo-European roots