ar·chi·ge·tes \ˌärkəˈjēd.ēz, ärˈkijəˌtēz\noun Usage: capitalized Etymology: New Latin : a genus of pseudophyllidean tapeworms living as neotenic larvae in the coelom of aquatic oligochaete worms, some being reported to develop into typical caryophyllid worms when the host is ingested by a suitable fish — compare caryophyllaeidae