Trough
Trough (trof) , noun
[Old English trough, trogh, Anglo-Saxon trog, troh; akin to Dutch, German, & Icelandic trog, Swedish tråg, Danish trug; probably originally meaning, made of wood, and akin to English tree. r63 & 241. See Tree, and compare Trug.]
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.
3.
(Meteorology) The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.
Collocations (2)
Trough gutter (Architecture) , a rectangular or V-shaped gutter, usually hung below the eaves of a house.
Trough of the sea , the depression between two waves.