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angle of repose

noun

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


angle of repose

noun

  1. the maximum angle to the horizontal at which rocks, soil, etc, will remain without sliding
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of angle of repose1

First recorded in 1875–80

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angle of refractionangle of roll