How would knowledge of the word parts protos and stoma help you define the word protostomes?
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Definition of protostome
: any of a major group (Protostomia) of bilateral metazoan animals (such as mollusks, annelids, and arthropods) characterized in typical forms by determinate and spiral cleavage, formation of a mouth and anus directly from the blastopore, and formation of the coelom by splitting of the embryonic mesoderm
— compare DEUTEROSTOME
First Known Use of protostome
1959, in the meaning defined above
History and Etymology for protostome
New Latin Protostomia, from prot- + Greek stoma mouth — more at STOMACH entry 1
Explanation:
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