Definition of alluvium in English:



  • [mass noun] A deposit of clay, silt, and sand left by flowing floodwater in a river valley or delta, typically producing fertile soil.

    • ‘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.’
    • ‘Many vineyards are located on valley bottoms underlain by alluvium which can provide deep, free-draining soils of variable grain size.’
    • ‘Some of these low-lying areas, with waterlogged deposits blanketed by alluvium, have provided good evidence for Roman farming.’
    • ‘The upper region of the Camargue, blessed with rich alluvium soil, has been cultivated since the Middle Ages.’
    mud, muck, mire, ooze, silt, alluvium, dirt, slime, slush, slurry
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Mid 17th century: Latin, neuter of alluvius washed against, from ad- towards + luere to wash.