trough

trough

1. a narrow depression either in the land surface, ocean bed, or between two successive waves

2. Meteorol an elongated area of low pressure, esp an extension of a depression

3. Physics the portion of a wave, such as a light wave, in which the amplitude lies below its average value

4. Economics the lowest point or most depressed stage of the trade cycle

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

trough

[trȯf]

(geology)

A small, straight depression formed just offshore on the bottom of a sea or lake and on the landward side of a longshore bar.

Any narrow, elongate depression in the surface of the earth.

An elongate depression on the sea floor that is wider and shallower than a trench. Also known as submarine trench.

The line connecting the lowest points of a fold.

(meteorology)

An elongated area of relatively low atmospheric pressure; the opposite of a ridge.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

trough

A channel used to carry electric conductors.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.