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colluvium

[kuh-loo-vee-uh m] /kəˈlu vi əm/
noun, plural colluvia
[kuh-loo-vee-uh] /kəˈlu vi ə/ (Show IPA),
colluviums. Geology
1.
loose earth material that has accumulated at the base of a hill, through the action of gravity, as piles of talus, avalanche debris, and sheets of detritus moved by soil creep or frost action.
Origin
1935-1940
1935-40; < Neo-Latin, equivalent to Latin colluv-, base of colluere to wash out (see collutory) + -ium -ium, on the model of Latin alluvium alluvium, dīluvium deluge
Related forms
colluvial, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for colluvial

colluvium

/kəˈluːvɪəm/
noun (pl) -via (-vɪə), -viums
1.
a mixture of rock fragments from the bases of cliffs
Derived Forms
colluvial, adjective
Word Origin
Latin: collection of filth, from colluere to wash thoroughly, from com- (intensive) + luere to wash
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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colluvial in Science
colluvium
  (kə-l'vē-əm)   
Plural colluviums or colluvia
A loose deposit of rock debris accumulated through the action of rainwash or gravity at the base of a gently sloping cliff or slope.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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