The Collaborative International Dictionary of English v.0.48:
Vaporizer \Vap"o*ri`zer\, n. One who, or that which, vaporizes, or converts into vapor. [1913 Webster]WordNet (r) 3.0 (2006):
vaporizer n 1: a device that puts out a substance in the form of a vapor (especially for medicinal inhalation) [syn: vaporizer, vaporiser]