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.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.
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