sediment
/ˈsɛd.ɪ.mənt/ noun C1- A collection of small particles, particularly dirt, that precipitates from a river or other body of water. · The Nile delta is composed of sediment that was washed down and deposited at the mouth of the river.
Plural sediments
From the library
By deliberately narrowing the river channel, the embankments cleverly increased the velocity of the water, thereby helping to scour the riverbed clean of remaining sediment.
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