master cylinder
- the hydraulic pump of an automotive braking system that contains a cylinder and one or two pistons, is actuated by the brake pedal, and supplies hydraulic fluid under pressure to the brakes at each wheel.
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Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
master cylinder
- a large cylinder in a hydraulic system in which the working fluid is compressed by a piston enabling it to drive one or more slave cylindersSee also slave cylinder
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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