inhalation

in·ha·la·tion  (nh-lshn)

n.

1. The act or an instance of inhaling.

2. An inhalant.

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inhalation  (nh-lshn)

The act of taking in breath. Inhalation results from the negative pressure in the lungs caused by contraction of the diaphragm, which causes it to move downwards and to expand the chest cavity. The resulting flow of air into the lungs restores a pressure equal to that of the atmosphere. Also called inspiration. Compare exhalation.

Thesaurus

Noun	1.	inhalation - the act of inhaling; the drawing in of air (or other gases) as in breathing breathing in, intake, aspiration, inspiration breathing, external respiration, respiration, ventilation - the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation breath - the process of taking in and expelling air during breathing; "he took a deep breath and dived into the pool"; "he was fighting to his last breath" gasp, pant - a short labored intake of breath with the mouth open; "she gave a gasp and fainted" drag, pull, puff - a slow inhalation (as of tobacco smoke); "he took a puff on his pipe"; "he took a drag on his cigarette and expelled the smoke slowly"
	2.	inhalation - a medication to be taken by inhaling it inhalant medicament, medication, medicinal drug, medicine - (medicine) something that treats or prevents or alleviates the symptoms of disease

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inhalation

noun breathing, breath, inspiration, inhaling