Medical Dictionary


noun res·pi·ra·tor \ˈres-pə-ˌrāt-ər\

Medical Definition of RESPIRATOR

:  a device (as a gas mask) worn over the mouth and nose to protect the respiratory system by filtering out dangerous substances (as dust or fumes) from inhaled air
:  a device for maintaining artificial respiration <a mechanical respirator>—called also ventilator
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