trough

A long, narrow, generally shallow receptacle for holding water or feed for animals.

Any of various similar containers for domestic or industrial use, such as kneading or washing.

A gutter under the edge of a roof for carrying off rainwater.

A long, narrow depression, as between waves or ridges.

A low point in a business cycle or on a statistical graph.

An elongated region of relatively low atmospheric pressure, often associated with a front.

A minimum point in a wave or an alternating signal.

In mining, an oblong tank of boards or metal in which ores are washed for the separation of metal and gangue; a rocker, serving as a hand-buddle.

In coalmining, a passage cut through a supporting pillar of coal to connect one opened chamber with another. Also called thirling.