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[kuh-loo-vee-uh m] /kəˈlu vi əm/
noun, plural colluvia
[kuh-loo-vee-uh] /kəˈlu vi ə/ (Show IPA),
colluviums. Geology
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 of colluvium
1935-40; < New 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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for colluvial
Historical Examples
  • Clays transported in this way are termed by Ries colluvial clays, the term 'diluvial' is generally employed in this country.

    The Natural History of Clay Alfred B. Searle
British Dictionary definitions for colluvial


noun (pl) -via (-vɪə), -viums
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
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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