A deposit of clay, silt, sand, and gravel left by flowing streams in a river valley or delta, typically producing fertile soil.
More example sentences
- Many vineyards are located on valley bottoms underlain by alluvium which can provide deep, free-draining soils of variable grain size.
- The measured soil parameters at the sites were within the normal range for bottomland hardwood soils of Mississippi River alluvium.
- In the east, which is lower and flatter, river gravels and alluvium from the North Sea have produced dark, rich soils.
mid 17th century: Latin, neuter of alluvius 'washed against', from ad- 'toward' + luere 'to wash'.
Definition of alluvium in:
- The British & World English dictionary