VENTILATOR
ventilator
(noun) a device (such as a fan) that introduces fresh air or expels foul air
Source: WordNet® 3.1
Etymology
Noun
ventilator (plural ventilators)
A device that circulates fresh air and expels stale or noxious air.
(medicine) A machine that moves breathable air into and out of the lungs of a patient who is unable to breathe sufficiently.
Hypernym: respirator
(obsolete, slang) A play or an actor so bad as to empty the theater.
Source: Wiktionary
Ven"ti*la`tor, n. Etym: [Cf. F. ventilateur, L. ventilator a
winnower.]
Definition: A contrivance for effecting ventilation; especially, a
contrivance or machine for drawing off or expelling foul or stagnant
air from any place or apartment, or for introducing that which is
fresh and pure.
Source: Webster’s Unabridged Dictionary 1913 Edition