Akademik

exhalation
1. Breathing out. SYN: expiration (1). 2. The giving forth of gas or vapor. 3. Any exhaled or emitted gas or vapor. [L. ex-halo, pp. -halatus, to breathe out]

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ex·ha·la·tion .eks-(h)ə-'lā-shən n
1) the action of forcing air out of the lungs
2) something (as the breath) that is exhaled or given off

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n.
the act of breathing air from the lungs out through the mouth and nose. See breathing.

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ex·ha·la·tion (eks″hə-laґshən) [L. exhalatio, from ex out + halare to breathe] the act of breathing out; called also expiration.

Medical dictionary. 2011.