upthrust

[uhp-thruhst]
noun
1.
a thrust in an upward direction.
2.
a sudden and forceful upward movement, as of a nation's economy or the stock market: Market observers are hoping the upthrust can be sustained.
3.
Geology. an upheaval.
verb (used without object)
4.
to thrust upward: Frost caused the ground to upthrust.

Origin:
1840–50; up- + thrust

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
upthrust (ˈʌpˌθrʌst)
 
n
1.  an upward push or thrust
2.  geology a violent upheaval of the earth's surface

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
She was busy frying vegetables, squinting at the smoking oil from the shelter of an upthrust arm.
Tend to form an upthrust or angle at the center of the pattern.
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