PROTOSTOME


Meaning of PROTOSTOME in English

transcription, транскрипция: [ ˈprō-tə-ˌstōm ]

noun

Etymology: New Latin Protostomia, from prot- + Greek stoma mouth — more at stomach

Date: 1959

: any of a major group (Protostomia) of bilateral metazoan animals (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

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.