noun
: the head (sense 14a) lost by flowing water as a result of friction between the moving water and the walls of its conduit plus intermolecular disturbances
noun
: the head (sense 14a) lost by flowing water as a result of friction between the moving water and the walls of its conduit plus intermolecular disturbances
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012