Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A gill or similar organ of respiration.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A gill or other organ having the same function.

from the GNU version of the Collaborative International Dictionary of English

  • n. A gill; a respiratory organ for breathing the air contained in water, such as many aquatic and semiaquatic animals have.

from The Century Dictionary and Cyclopedia

  • Same as branchiæ.
  • n. One of the constituents of the branchial apparatus; a gill. See branchiæ

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. respiratory organ of aquatic animals that breathe oxygen dissolved in water

Etymologies

Latin, from Greek brankhia, gills.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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