up-thrust

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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