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.
... whooping-cough, three or four grains of the extract should be mixed with a pint of boiling water in a suitable inhaler, so that the medicated vapour may be inspired ... — Herbal Simples Approved for Modern Uses of Cure • William Thomas Fernie
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