tectibranch

tectibranch

(ˈtɛktɪˌbræŋk) n (Animals) a mollusc of the suborder Tectibranchia (or Tectibranchiata) (order: Opisthobranchia) which includes the sea slugs and sea hares[C19: New Latin, from tectus covered, from tegere to cover + branchia: see -branch]