alluvium Meaning, Definition & Usage

  1. noun clay or silt or gravel carried by rushing streams and deposited where the stream slows down
    alluvial sediment; alluvion; alluvial deposit.

WordNet

Al*lu"vi*um noun
Etymology
L., neut. of alluvius. See Alluvious.
Wordforms
plural E Alluviums, L Alluvia
Definitions
  1. (Geol.) Deposits of earth, sand, gravel, and other transported matter, made by rivers, floods, or other causes, upon land not permanently submerged beneath the waters of lakes or seas. Lyell.

Webster 1913