noun
: a brake using a partial vacuum in its operation ; specifically : an automobile brake in which the braking pressure applied by the operator is augmented by the negative pressure of the suction on the intake manifold
noun
: a brake using a partial vacuum in its operation ; specifically : an automobile brake in which the braking pressure applied by the operator is augmented by the negative pressure of the suction on the intake manifold
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012