exhalation

[eks-huh-ley-shuh n, ek-suh-] /ˌɛks həˈleɪ ʃən, ˌɛk sə-/
noun
1.
the act of exhaling.
2.
something that is exhaled; vapor; emanation.
Origin
1350-1400; Middle English exalacion < Latin exhālātiōn- (stem of exhālātiō). See exhale, -ation
Examples from the web for exhalation
  • Other tests require forced inhalation or exhalation after a deep breath.
  • Some are made without exhalation valves, making them particularly useful in certain health-care settings.
  • exhalation resistance as with demand units is determined at maximum deflection ignoring the relief valve pressure spike.
Word Origin and History for exhalation
n.

late 14c., from Latin exhalationem (nominative exhalatio), noun of action from past participle stem of exhalare (see exhale).

exhalation in Medicine

exhalation ex·ha·la·tion (ěks'hə-lā'shən, ěk'sə-)
n.

  1. The act or an instance of breathing out. Also called expiration.

  2. The giving forth of gas or vapor.

  3. Something, such as air or vapor, that is exhaled.

exhalation in Science
exhalation
  (ěks'hə-lā'shən)   
The act of breathing out air. During exhalation, the diaphragm relaxes and moves upward, causing compression of the lungs and an outward flow of air. Also called expiration. Compare inhalation.