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Ostracea

From Wiktionary, the free dictionary

Translingual

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Etymology

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From Ostrea +‎ -acea.

Proper noun

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Ostracea

  1. (obsolete) A taxonomic order within the class Bivalvia – a polyphyletic taxon comprising both the true oysters (now in the order Ostreoida) as well as similarly shaped bivalves, like the saddle oysters.
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