Annelida

Synonyms

Annelidas

Segmented Worm

Segmented Worms

Worm, Segmented

Worms, Segmented

A phylum of metazoan invertebrates comprising the segmented worms, and including marine annelids (POLYCHAETA), freshwater annelids, earthworms (OLIGOCHAETA), and LEECHES. Only the leeches are of medical interest. (Dorland, 27th ed)