Noun: archiannelid
- Small primitive marine worm lacking external segmentation and resembling polychaete larvae
"The archiannelid's simple body structure intrigued evolutionary biologists"
Derived forms: archiannelids
Type of: annelid, annelid worm, segmented worm
Part of: Archiannelida, class Archiannelida
Encyclopedia: Archiannelid