any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae

segmented worms: earthworms; lugworms; leeches

small primitive marine worm lacking external segmentation and resembling polychaete larvae

hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body

chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles

carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end

segmented worms: earthworms; lugworms; leeches