An elongated area of low pressure in the atmosphere.

The point in a business cycle when an economic contraction reaches its lowest level before turning up. Contrasts with peak.

The minimum (negative) deflection of the seismic wavelet. Seismic interpreters commonly pick or track seismic data on paper sections along the trough of a wavelet rather than the solid-colored peak. W [..]

The transition point between economic recession and recovery.

An elongated area of relatively low atmospheric pressure, usually extending from the center of a low pressure system. 

  High-temperature (180+) concentrator with one axis-tracking.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

Old English trog "wooden vessel, tray, hollow vessel, canoe," from Proto-Germanic *trugaz (source also of Old Frisian, Old Saxon, Old Norse trog, Middle Dutch troch, Dutch trog, Old High Ger [..]

long, narrow, open-topped box usually used to hold food or water for animals.

a gently sloping depression in the ocean floor.

A trough of low pressure is an elongated area where atmospheric pressure is low relative to its immediate surroundings. A trough of low pressure is sometimes indicated on the synoptic chart by a centr [..]

The transition of a business cycle from a contraction and an expansion. The end of a contraction carries the descriptive term trough. At the trough, the economy has reached the lowest level of product [..]

a narrow depression (as in the earth or between ocean waves or in the ocean bed) gutter: a channel along the eaves or on the roof; collects and carries away rainwater bowl: a concave shape with an ope [..]

a long narrow container which covers from your waist to your ankles, fitting around each leg separately

1) In geology, a trough generally refers to a linear structural depression that extends laterally over a distance, while being less steep than a trench. 2) In metrology, an elongated region of relativ [..]

An elongated area of relatively low atmospheric pressure surface or aloft. Usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge. Sour [..]

Definition A low point or local minimum.

Verb. To eat. The imagery is of eating like an animal.

In a business cycle, a low level of output and employment, normally followed by a rise in output and employment.

A region of downward displacement in a transverse wave.

The point of maximum negative displacement on a transverse wave is called a trough.

This refers to waves. The trough of a wave is simply the part of the wave with the least (most negative) amplitude.

This refers to waves. The trough of a wave is simply the part of the wave with the least (most negative) amplitude.

(n) a narrow depression (as in the earth or between ocean waves or in the ocean bed)(n) a channel along the eaves or on the roof; collects and carries away rainwater(n) a treasury for government funds [..]

The lowest point of a transverse wave below the rest position (Lesson 20)

The lowest part of the wave between successive crests.

A warning issued when sustained winds of 39 to 73 mph (34 to 63 knots) are expected within 24 hours. In Canada, it is described as an elongated area of relatively low pressure extending from the centr [..]

 the part of the ocean wave that is displaced below the still water line

The hollow between two waves. Oceanographically, a long depression of the sea floor characteristically steep-sided and normally shallower, than a trench.

a persistent area of low pressure, bringing low stratus clouds and precipitation.

An elongated area of low atmospheric pressure that is associated with an area of minimum cyclonic circulation. The opposite of a ridge.

The lowest point in a propagating or standing wave. See low water and tidal wave. A long and broad submarine depression with gently sloping sides.

See WAVE TROUGH

An elongated low-pressure system that enhances showers into longer spells of rain or snow.

The bottom of a wave, the valley between the crests.

the depression between two waves

The bottom of a wave, the valley between the crests.

The steep-walled (though rarely vertical), broad-floored shape considered diagnostic of former mountain glaciation.   Often contrasted to the "V" shape typical of mass wasting slopes feeding [..]

Transition point between economic recession and recovery.

Elongated area of low atmospheric pressure, either at the surface or in the upper atmosphere.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

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

n. "trough," s.v. trough sb. OED. KEY: trough@n

n 4 trogh 3 trough 1

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low.

In meteorology, an elongated area of relatively low atmospheric pressure; usually associated with and most clearly identified as an area of maximum cyclonic curvature of the wind flow (isobars, contou [..]

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

Low pressure systems are areas, or closed systems, of low pressure and are also known as troughs and cyclones. Low pressure systems are associated with counter-clockwise rotating air, in which at the surface the air moves toward the center, and away from the center at high levels. Thus, air is forced to rise in the center of low pressure systems. L [..]

the lowest point in a wave; also a channel for water; a long channel or hollow.

An elongated area of low atmospheric pressure that is associated with an area of minimum cyclonic circulation. The opposite of a ridge.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. Usually marks a sharp boundary in wind direction and is associated with cloudiness and shower or storm development. A trough can often denote an airmass boundary. This may be an area of sharp te [..]

In meteorology, an elongated area of relatively low atmospheric pressure; the opposite of a ridge. The axis of a trough is the trough line. This term is commonly used to distinguish the previous condi [..]

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

An elongated axis of low pressure.

An elongated area of relatively low atmospheric pressure; the opposite of a ridge. It is usually associated with unsettled conditions.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

An elongated area of low atmospheric pressure that is associated with an area of minimum cyclonic circulation. The opposite of a ridge.

An elongated area of low pressure at the surface or aloft.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

This is a feature that I mention most at the 500mb level in the atmosphere.  When a trough is over the east coast, it creates almost a U with the east coast in the middle, resulting in cold air being [..]

An elongated area of relatively low atmospheric pressure surface or aloft. Usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge. UKME [..]

An elongated area of low atmospheric pressure that is associated with an area of minimum cyclonic circulation. The opposite of a ridge.

An elongated area of low atmospheric pressure

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.

An elongated area of low atmospheric pressure that is associated with an area of minimum cyclonic circulation. The opposite of a ridge.

is a term used to indicate a market bottom.

The bottom between two waves.

The peak of the negative alternation (maximum value below the line) of a sine wave.

A long, narrow container, open on top, for feeding or watering animals. ''One of Hank's chores was to slop the pigs' trough each morning and evening.'' Any similarly shaped container. # (Austra [..]

The bottom of the wave (the opposite of a crest).