angle of repose

angle of repose

noun Geology.
the maximum slope, measured in degrees from the horizontal, at which loose solid material will remain in place without sliding.


Origin:
1875–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Angle of repose is always a great word to know.
So is soil. Does it mean:
portion of the earth's surface consisting of disintegrated rock and humus
slow movement of water through the pores in soil or permeable rock
Collins
World English Dictionary
angle of repose
 
n
the maximum angle to the horizontal at which rocks, soil, etc, will remain without sliding

Collins English Dictionary - Complete & Unabridged 10th Edition
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