pneumatic

pneu|mat|ic /njuːm'ætɪk/
1 [ADJ] ADJ n
A pneumatic drill is operated by air under pressure and is very powerful. Pneumatic drills are often used for digging up roads.
...the sound of a pneumatic drill hammering away.
2 [ADJ] ADJ n
Pneumatic means filled with air.
...pneumatic tyres.

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