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Matter found in troughs of grindstones after the grinding of edge tools. [Prov. Eng.] Sir W. Petty.

A long box or trough through which water flows, -- used for washing auriferous earth. Sluice gate, the sliding gate of a sluice.

An artificial channel into which water is let by a sluice; specifically, a trough constructed over the bed of a stream, so that logs, lumber, or rubbish can be floated down to some convenient place of delivery.

A trough for conducting grain, flour, etc., into a receptacle.

A trough for washing broken ore, gravel, or sand; a launder.

A trough for washing ore.

Formed by strata dipping toward a common line or plane; as, a synclinal trough or valley; a synclinal fold; -- opposed to anticlinal.

A small trough or wooden vessel, sometimes scooped out of a block of wood, for various domestic uses, as in making bread, chopping meat, etc.

A wooden trough, forming a drain. Raymond.

A trough, or tray. Specifically:

A trough for washing ores. Knight.

etchers and engravers to make a bank, or wall, round the edge of a plate, so as to form a trough for holding the acid used in etching, and the like. Fairholt.

ed by numerous pores, or tubules, and resembling the rose of a watering pot. -- Watering trough, a trough from which cattle, horses, and other animals drink.

A trough for discharging water.

A chasm, mouth, or passageway. [R.] Now gape the graves, and trough their yawns let loose Imprisoned spirits. Marston.

The time of the apparent revolution of the sun trough the ecliptic; the period occupied by the earth in making its revolution around the sun, called the astronomical year; also, a period more or less nearly agreeing with this, adopted by various nations as a measure of time, and called the civil year; as, the common lu…

. or Prov. Eng.] Grose. My fowls, which well enough, I, as before, found feeding at their trough Their yoted wheat. Chapman.