| Word | Definitions | Synonyms |
|---|---|---|
| oligochaete | (noun) hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body | Synonyms: oligochaete worm |
| polychaete | (noun) chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles | Synonyms: polychaete worm, polychete, polychete worm |
| spirochaete | (noun) parasitic or free-living bacteria; many pathogenic to humans and other animals | Synonyms: spirochete |