[ kuh-loo-vee-uh m ]
/ kəˈlu vi əm /

noun, plural col·lu·vi·a [kuh-loo-vee-uh] /kəˈlu vi ə/, col·lu·vi·ums. 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


col·lu·vi·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for colluvium

/ (kəˈluːvɪəm) /

noun plural -via (-vɪə) or -viums

a mixture of rock fragments from the bases of cliffs

Derived forms of colluvium

colluvial, adjective

Word Origin for colluvium

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

Science definitions for colluvium

[ kə-lōōvē-əm ]

Plural colluviums 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.