noun
: a brake working by water pressure ; especially : a locomotive brake that admits water to the locomotive cylinders and offers resistance to the movement of the pistons while descending a grade
noun
: a brake working by water pressure ; especially : a locomotive brake that admits water to the locomotive cylinders and offers resistance to the movement of the pistons while descending a grade
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012