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)