archiannelid

English Thesaurus

1. small primitive marine worm lacking external segmentation and resembling polychaete larvae (noun.animal)

hypernym	:	annelid, annelid worm, segmented worm,
definition	:	worms with cylindrical bodies segmented both internally and externally (noun.animal)

member meronym	:	archiannelida, class archiannelida,
definition	:	a class of Annelida (noun.animal)