pneumatic
adjective(pneu-mat-ic)
of, relating to, or using gas (such as air or wind):
pneumatic
adjective(pneu-mat-ic)
moved or worked by air pressure
pneumatic
adjective(pneu-mat-ic)
adapted for holding or inflated with compressed air
pneumatic
noun(pneu-mat-ic)
a heavy tool used to break hard substances (such as concrete) into pieces by a repeated pounding action