pneumatic

/njuːˈmætɪk/
noun
  1. A tire filled with compressed air, especially on a vehicle.
    • The bicycle's rear pneumatic went flat after hitting a sharp rock.
    • He checked the pressure in all four pneumatics before the long drive.
    • Modern cars use tubeless pneumatics for better performance.
adjective
  1. Filled with or operated by air or gas under pressure.
    • The factory installed a pneumatic conveyor system to move materials quickly.
    • Pneumatic tires are filled with compressed air to provide a smooth ride.
    • The mechanic used a pneumatic drill to break up the old pavement.
  2. Relating to or using compressed air as a source of power.
    • Pneumatic tools like nail guns and air hammers are common in construction.
    • Many modern trains use pneumatic brakes for safer stopping.
    • The dentist's pneumatic drill makes a high-pitched whirring sound.
  3. Having a shape or structure that is inflated with air, often for cushioning or support.
    • Pneumatic cushions in the car seat adjust to the driver's weight.
    • The patient's hospital bed had a pneumatic mattress to prevent bedsores.
    • The inflatable boat is made of pneumatic chambers that keep it afloat.