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pneumatic pneu·mat·ic (nōō-māt'ĭk, nyōō-)adj.
Of or relating to air or other gases.
Relating to respiration.
Relating to a structure that is filled with air.
Relating to gases, especially air.
Filled with or operated by compressed air. Pneumatic machines often involve the transmission of force through air pressure in pipes or tubes. See also hydraulic.