hydraulics

/haɪˈdrɔːlɪks/
noun
  1. The branch of science or engineering that deals with the mechanical properties of liquids, especially water, and their use to generate power or control movement.
    • The car's braking system relies on hydraulics to stop the wheels.
    • He studied hydraulics in college to learn how dams and pumps work.
    • Modern construction equipment uses hydraulics to lift heavy loads.
  2. The system of pipes, pumps, and fluids used to transmit power in machinery or vehicles.
    • The mechanic checked the hydraulics on the forklift before the job.
    • A leak in the hydraulics caused the excavator arm to stop moving.
    • The airplane's landing gear uses hydraulics to fold up after takeoff.
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