hydraulic brake

noun
a brake operated by fluid pressures in cylinders and connecting tubular lines.

Origin:
1870–75

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World English Dictionary
hydraulic brake
 
n
a type of brake, used in motor vehicles, in which the braking force is transmitted from the brake pedal to the brakes by a liquid under pressure

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The hydraulic brake system did not have any external fluid leaks.
If you fail the air or hydraulic brake check, it will be an automatic failure.
It is also used in hydraulic brake fluids and inks used in stamp pads,
  ballpoint pens, and print shops.
It is used as a solvent, and in hydraulic brake fluid and antifreeze.
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