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New Latin, from Latin a- + branchia (gill).

Proper noun[edit]


  1. (zoology) Animals without gills.
    1. (obsolete) All of those vertebrates that never have gills in their development.
    2. (dated) A taxonomic order within the phylum Gastropoda – somewhat similar to the order Nudibranchia..
    3. (obsolete) A taxonomic order within the phylum Annelidaannelids that lacked specialized respiratory systems, the Oligochaeta, including earthworms.

Further reading[edit]

  • Abranchia in The Century Dictionary, The Century Co., New York, 1911