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trough
trough / trôf/ • n. a long, narrow open container for animals to eat or drink out of: a water trough. ∎ a container of a similar shape used for a purpose such as growing plants or mixing chemicals. ∎ a channel used to convey a liquid. ∎ a long hollow in the earth's surface: a vast glacial trough. ∎ an elongated region of low atmospheric pressure. ∎ a hollow between two wave crests in the sea. ∎ a low level of economic activity. ∎ Math. a region around the minimum on a curve of variation of a quantity. ∎ a point of low achievement or satisfaction: learning a language is a series of peaks and troughs. |
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"trough." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "trough." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O999-trough.html "trough." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-trough.html |
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trough
trough
1. An extension of low atmospheric pressure from the central regions of a low-pressure system into a zone where generally higher pressure prevails. The term ‘trough’ is also, and in accordance with this definition, applied to equatorward meanders of the flow of the upper westerly winds over middle latitudes. (The ‘equatorial trough’, where trade winds meet, is synonymous with the ‘intertropical convergence zone’.) See also LONG WAVE. 2. The lowest point of a fold surface. |
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AILSA ALLABY and MICHAEL ALLABY. "trough." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "trough." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-trough.html AILSA ALLABY and MICHAEL ALLABY. "trough." A Dictionary of Earth Sciences. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-trough.html |
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trough
trough
1. An extension of low atmospheric pressure from the central regions of a low-pressure system into a zone where generally higher pressure prevails. 2. A meander towards the equator in the flow of the upper westerly winds over middle latitudes. (The ‘equatorial trough’, where trade winds meet, is synonymous with the intertropical convergence zone’.) |
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MICHAEL ALLABY. "trough." A Dictionary of Ecology. 2004. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "trough." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O14-trough.html MICHAEL ALLABY. "trough." A Dictionary of Ecology. 2004. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-trough.html |
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trough
trough oblong open vessel, esp. to contain liquid OE.; channel, pipe XIV; hollow, valley XVI; t. of the sea hollow on the surface between waves XVII. OE. trog = OS. trog, OHG. troc (Du., G. trog), ON. trog :- Gmc. *truzaz :- IE. *drukós, f. *dru- wood, TREE.
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T. F. HOAD. "trough." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "trough." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O27-trough.html T. F. HOAD. "trough." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-trough.html |
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trough
trough In meteorology, area of low atmospheric pressure, usually an extension to a depression. The opposite are ridges of high pressure.
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"trough." World Encyclopedia. 2005. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "trough." World Encyclopedia. 2005. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O142-trough.html "trough." World Encyclopedia. 2005. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-trough.html |
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trough
trough trôf n. a hollow between two wave crests in the sea.
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"trough." The Oxford Essential Dictionary of the U.S. Military. 2001. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "trough." The Oxford Essential Dictionary of the U.S. Military. 2001. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O63-trough.html "trough." The Oxford Essential Dictionary of the U.S. Military. 2001. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O63-trough.html |
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trough
trough
•boff, cough, doff, far-off, off, quaff, roll-on roll-off, scoff, telling-off, toff, trough
•lay-off, payoff, playoff
•show-off • Khrushchev • Gorbachev
•stand-off • Meyerhof • Cracow
•Schwarzkopf • Chekhov • Cherenkov
•take-off • kick-off • Kalashnikov
•Baryshnikov • Rimsky-Korsakov
•Kirchhoff • Karloff • Wolof • spin-off
•Rachmaninov • Ustinov • Godunov
•Stroganoff • Romanov • rip-off
•eavestrough • Sakharov • cut-off
•Molotov
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"trough." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>. "trough." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O233-trough.html "trough." Oxford Dictionary of Rhymes. 2007. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-trough.html |
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