Definition of polybranchiate in English:

polybranchiate

Pronunciation /ˌpɒlɪˈbraŋkɪeɪt/ /ˌpɒlɪˈbraŋkɪət/

adjective

rare Zoology
  • (Of an invertebrate or fish) having many gills; formerly especially (of a nudibranch mollusc) belonging to the former group Polybranchia or Polybranchiata.

Origin

Mid 19th century; earliest use found in Robert Mayne (1808–1868).