Annelida, phylum Annelida - segmented worms: earthworms; lugworms; leeches

oligochaete, oligochaete worm - hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body

dew worm, earthworm, fishing worm, fishworm, nightcrawler, nightwalker, red worm, angleworm, crawler, wiggler - terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers

Branchiobdellidae, family Branchiobdellidae - small annelid worms with the posterior end modified into an adhesive sucker; especially formerly regarded as modified leeches

class - (biology) a taxonomic group containing one or more orders