vacuum brakeEnglishOxford New American Dictionaryvacuum brake /ˈvakˌyo͞om brāk, ˈvækˌjum breɪk/ ▸ noun a railroad-vehicle brake operated by changes in pressure in a continuous pipe that is generally kept exhausted of air by a pump and controls similar brakes throughout the train.
EnglishOxford New American Dictionary
