trough of low pressure

trough of low pressure
A pressure system in which the isobars around a low pressure become elongated such that the pressure is lower along the axes of the trough than on its two sides. Sometimes, the isobars at a trough have a pronounced V-shape. Active weather fronts always lie in troughs, but not all troughs are frontal.

Aviation dictionary. 2014.

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  • Low-pressure area — This depiction of the Hadley cell shows the process which sustains low pressure areas. Diverging winds aloft allow for lower pressure and convergence at the Earth s surface, which leads to upward motion. A low pressure area, or low , is a region… …   Wikipedia

  • trough — [[t]trɒ̱f, AM trɔ͟ːf[/t]] troughs 1) N COUNT A trough is a long narrow container from which farm animals drink or eat. The old stone cattle trough still sits by the main entrance. 2) N COUNT A trough is a low area between two big waves on the sea …   English dictionary

  • trough — [trɔf US tro:f] n ▬▬▬▬▬▬▬ 1¦(container)¦ 2¦(low point)¦ 3¦(waves)¦ 4¦(weather)¦ 5 have your nose/snout in the trough ▬▬▬▬▬▬▬ [: Old English; Origin: trog] 1.) ¦(CONTAINER)¦ a long narrow open container that holds water or food for animals …   Dictionary of contemporary English

  • trough — [ trɔf ] noun count 1. ) a long narrow open container used for holding food or water for animals: a cattle trough 2. ) a low area between two high waves or hills: The boat lay almost helpless in the trough of the waves. 3. ) a period when… …   Usage of the words and phrases in modern English

  • Trough (meteorology) — A trough is an elongated region of relatively low atmospheric pressure, often associated with fronts. Unlike fronts, there is not a universal symbol for a trough on a weather chart. In the United States, a trough may be marked as a dashed line.… …   Wikipedia

  • trough — UK [trɒf] / US [trɔf] noun [countable] Word forms trough : singular trough plural troughs 1) a long narrow open container used for holding food or water for animals a cattle trough 2) a low area between two high waves or hills The boat lay almost …   English dictionary

  • trough — Synonyms and related words: adit, aerospace, aerosphere, air hole, air pocket, airspace, alveolation, alveolus, amplitude, antinode, antrum, aqueduct, armpit, basin, billow, bore, bottom, bottom glade, bottoms, bowl, breakers, bump, burrow, canal …   Moby Thesaurus

  • trough — noun (C) 1 a long narrow open container that holds water or food for animals 2 the hollow area between two waves in the sea or between two hills 3 a short period of low activity, low prices etc in something that is continuously measured over a… …   Longman dictionary of contemporary English

  • trough — /trɒf / (say trof) noun 1. an open, box like receptacle, usually long and narrow, as for containing water or food for animals, or for any of various other purposes. 2. any receptacle of similar shape. 3. WA, SA, Victoria, Tasmania a large sink… …  

  • trough — trÉ”f /trÉ’f n. long and narrow receptacle (e.g. for holding food and water for animals); channel or drain for transporting water; elongated depression between two waves; elongated area of low pressure (Meteorology); low point …   English contemporary dictionary

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