The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.
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.
Any channel, receptacle, or depression, of a long and narrow shape; as, trough between two ridges, etc.
trough in Dutch is krib, drenkbak, trog, eetbak, bak
trough in French is pour cette raison, auge
trough in German is Trog, Mulde
trough in Portuguese is calha
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