( n. )
A framework, trough, or tube, upon or through which objects are made to slide from a higher to a lower level, or through which water passes to a wheel.
( n. )
A framework, trough, or tube, upon or through which objects are made to slide from a higher to a lower level, or through which water passes to a wheel.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012