trough

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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.
References in periodicals archive ?
(21) Employment in the industry peaked in December 2006, 13 months before total nonfarm employment, and troughed in February 2011, with losses totaling 718,000.
(1997) argued that 'amorphous' grindstones and millstones are the opposite ends of a reduction trajectory that begins with flat grindstones and ends with the more deeply worn 'troughed' millstones.
DAVID Cameron hosted an upper-crust fundraiser where wealthy Tory donors troughed a gourmet three-course meal and won prizes including a pheasant shoot.
"Taking advantage of trading loopholes and insider tip-offs, Goldman peaked with an account balance of PS14 million but troughed with two spells in prison."
Figure 6 shows the number of metro markets that peaked and troughed in each year from 2005 through 2012.
We think that the complex relationships that exist between Idiognathodus and Streptognathodus must be investigated from the inception of these morphologies, from Morrowan and Atokan time, and that all troughed and partially troughed forms prior to Missourian should be excluded from Streptognathodus.
It has rallied more than $200 since the end of June when prices troughed at three-year lows and traders suspect some profit-taking is in order.
"Anecdotal evidence from the European suppliers indicates that European production levels troughed in the second quarter and have now begun to improve," Goldman Sachs analyst Stefan Burgstaller told investors in a July 4 note.
The cycle in nominal private sector credit growth lasted just over nine years which we date from April 2001 to September 2010 when growth troughed at -0.5 percent in annual terms.
However, with several central banks in the middle of aggressive easing policies and with the global economy likely to have troughed during 2012, growth is expected to pick up heading into the second half of 2013.
It said the recovery in manufacturing PMI for November suggests 'growth may have troughed' but added 'tight fiscal and monetary policy settings decrease the authorities' scope to support growth amid stubbornly high inflation and a commitment to consolidating public finances'.