Source : Webster's Revised Unabridged Dictionary (1913)

Inhaler \In*hal"er\, n.
   1. One who inhales.

   2. An apparatus for inhaling any vapor or volatile substance,
      as ether or chloroform, for medicinal purposes.

   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.

Source : WordNet®

inhaler
     n : a dispenser that produces a chemical vapor to be inhaled in
         order to relieve nasal congestion [syn: {inhalator}]