airer

Medical Dictionary

air (âr)
n.

  1. A colorless, odorless, tasteless, gaseous mixture, approximately 78 percent nitrogen and approximately 21 percent oxygen with lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and other gases.

  2. This mixture, with varying amounts of moisture and particulate matter, enveloping Earth; the atmosphere.

  3. Any of various respiratory gases. No longer in technical use.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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