col·lu·vi·um (k -l  v -m)n. pl. col·lu·vi·ums or col·lu·vi·a (-v -) A loose deposit of rock debris accumulated through the action of gravity at the base of a cliff or slope. [Latin, a collection of washings, dregs, from colluere, to wash thoroughly : com-, intensive pref.; see com- + -luere, to wash; see leu( )- in Indo-European roots.]col·lu vi·al adj. |
| colluvium (k-lv-m) 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. |
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