Worms with cylindrical bodies segmented both internally and externally; SYN. annelid worm, segmented worm.
Worm; composed of annular segments.
Any segmented worm of the phylum Annelida. Annelids include earthworms, leeches, and marine worms such as lugworms.
They have a distinct head and soft body, which is divided into a number of similar segments shut off from one another internally by membranous partitions, but there are no jointed appendages.

ETYM French annélide, from anneler to arrange in rings, Old Fren. anel a ring, from Latin anellus a ring, dim. of annulus a ring.
(Zoology) Relating to or belonging to or characteristic of any worms of the phylum Annelida; SYN. annelidan.