First Known Use: circa 1656
Dictionary
alluvium
noun al·lu·vi·um \-vē-əm\
plural al·lu·vi·ums or -via \-vē-ə\
Definition of ALLUVIUM
: clay, silt, sand, gravel, or similar detrital material deposited by running water
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Origin of ALLUVIUM
Medieval Latin, alteration of Latin alluvio
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