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

  • n. Normal, unlabored breathing.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Normal, relaxed breathing; healthy condition of inhalation and exhalation.

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

  • n. normal relaxed breathing


New Latin, from Greek eupnoia, from eupnoos, breathing well : eu-, eu- + pnein, to breathe; see pneu- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)


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