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respirator

res·pi·ra·tor [ réspə ràytər ] (plural res·pi·ra·tors)


noun 
Definition:
 
1. machine providing artificial respiration: a machine used in hospitals to maintain breathing for patients unable to breathe unaided

2. protective mask through which to breathe: a device placed over the nose and mouth to filter out noxious particles and fumes from inhaled air or to warm chilled air before it is inhaled

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