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Protostomes
(Gk. proto, first) Any bilateral animal whose first opening in the embryo (deriving from blastopore) becomes the mouth and the second opening the anus; also characterised by spiral cleavage during development; includes annelids, mollusks, arthropods , etc. usually gastroneuralia with the chord at the dorsal side
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- Part of Speech: noun
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- Industry/Domain: Zoology
- Category: Zoological terms
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