A deposit of soil, sand, mud, etc. left by flowing water, especially river water.
Late latin, from latin alluvius, from alluere to wash against.
- The alluvium deposited in the delta makes it very fertile.
- The alluvium along the banks of the river was rich in minerals.
- Archeologists found valuable artifacts in the alluvium.
- The alluvium provided crucial evidence of past climates.
- The farmer used the alluvium as fertilizer for his crops.