n. A gill or other organ having the same function.
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.
The Century Dictionary and Cyclopedia
n. One of the constituents of the branchial apparatus; a gill. See branchiæ
Same as branchiæ.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. respiratory organ of aquatic animals that breathe oxygen dissolved in water
Word Usage
"The orifice opens into the branchial cavity behind a conical lobe, which stands above the third foot in place of a branchia which is wanting in Ocypoda."