Definition of alluvium in English:

alluvium

Syllabification: al·lu·vi·um
Pronunciation: /əˈlo͞ovēəm
 
/

noun

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.

Origin

mid 17th century: Latin, neuter of alluvius 'washed against', from ad- 'toward' + luere 'to wash'.

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