Res"pi*ra`tor (r?s"p?*r?`t?r), n. [Cf.
F. respirateur.] A divice of gauze or wire, covering the
mouth or nose, to prevent the inhalation of noxious substances, as
dust or smoke. Being warmed by the breath, it tempers cold air passing
through it, and may also be used for the inhalation of medicated