D defs.my
Entry 3 senses Webster, 1913

Inhaler

/ĭnˌ-hāl'-ẽr/ · In·hal·er · IPA /ˌɪnhˈeɪlər/
01 n. One who inhales.
  1. 1.
    One who inhales.
  2. 2.
    An apparatus for inhaling any vapor or volatile substance, such as ether or chloroform, or an aerosol mist of a solution, for medicinal purposes; as, he alway carried his inhaler around in his pocket in case he had asthmatic attack.
  3. 3.
    A contrivance to filter, as air, in order to protect the lungs from inhaling damp or cold air, noxious gases, dust, etc.; also, the respiratory apparatus for divers.