air mass

air mass
noun
a large body of air with uniform characteristics horizontally
Hypernyms: ↑atmosphere, ↑atmospheric state
Hyponyms: ↑high, ↑low, ↑depression

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noun
: a body of air extending hundreds or thousands of miles horizontally and sometimes as high as the stratosphere and maintaining during transcontinental or transoceanic movements approximately uniform conditions of temperature and humidity at any given level

a polar continental air mass

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a body of air covering a relatively wide area, exhibiting approximately uniform properties through any horizontal section.
[1890-95]

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air mass noun
A vast horizontally uniform body of air
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Main Entry:air

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air mass,
a large body of air within the atmosphere that has nearly uniform temperature and humidity at any given level and moves horizontally over great distances without changing.

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n. Meterology a body of air with horizontally uniform temperature, humidity, and pressure

Useful english dictionary. 2012.

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