PNEUMATIC

[adjective] [not gradable] - operated by air pressure, or containing airOur car has pneumatic brakes (= they operate by air pressure).Pneumatic tyres (= those containing air) were invented in 1888 by John Dunlop.I've got a headache from listening to that pneumatic drill (US and ANZ also jackhammer) (= a powerful tool held in the hand which operates by air pressure and is used esp. for breaking hard surfaces, such as roads) going on outside all day.