colluvial

colluvium

[kuh-loo-vee-uhm]
noun, plural colluvia [kuh-loo-vee-uh] , 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:
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

colluvial, adjective
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World English Dictionary
colluvium (kəˈluːvɪəm)
 
n , pl -via, -viums
a mixture of rock fragments from the bases of cliffs
 
[Latin: collection of filth, from colluere to wash thoroughly, from com- (intensive) + luere to wash]
 
col'luvial
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
colluvium   (kə-l'vē-əm)  Pronunciation Key 
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
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