Trough
Pronunciation : Trough
Part of Speech : n.
Etymology : [OE. trough, trogh, AS. trog, troh; akin to D., G., & Icel. trog, Sw. tr?g, Dan. trug; probably originally meaning, made of wood, and akin to E. tree. Tree, and cf. Trug.]
Definition : 1. A long, hollow vessel, generally for holding water or other liquid, especially one formed by excavating a log longitudinally on one side; a long tray; also, a wooden channel for conveying water, as to a mill wheel.
2. Any channel, receptacle, or depression, of a long and narrow shape; as, trough between two ridges, etc. Trough gutter (Arch.), a rectangular or V-shaped gutter, usually hung below the eaves of a house. -- Trough of the sea, the depression between two waves.
Source : Webster's Unabridged Dictionary, 1913