INHALATION
inhalation, inspiration, aspiration, intake, breathing in
(noun) the act of inhaling; the drawing in of air (or other gases) as in breathing
inhalant, inhalation
(noun) a medication to be taken by inhaling it
Source: WordNet® 3.1
Etymology
Noun
inhalation (countable and uncountable, plural inhalations)
The act of inhaling; inbreathing.
The substance (medicament) which is inhaled.
Source: Wiktionary
In`ha*la"tion, n. Etym: [Cf. F. inhalation.]
Definition: The act of inhaling; also, that which is inhaled.
Source: Webster’s Unabridged Dictionary 1913 Edition