noun
: the amount of water furnished under a standard unit head : the amount of water that is furnished under unit lowering of the surface of the water in a well by pumping
noun
: the amount of water furnished under a standard unit head : the amount of water that is furnished under unit lowering of the surface of the water in a well by pumping
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012