Etymology From Latin alluvius (“alluvial”), from alluviō (“an overflowing, inundation”), from alluō (“wash against”). By surface analysis, alluvium + -ial.
1
Pertaining to the soil deposited by a stream.
I am a working engineer from the Mount Magdalena district of Coolgardie. I don't want to take up your time with outside details so I will only say that about two years ago I had an opportunity of acquiring a share in a very promising claim—gold, you understand, both reef and alluvial.1914, Ernest Bramah, Max Carrados:
Soils are a prominent feature of floodplain environments, and we include them in this section because most of the available information on ancient soils pertains to alluvial examples, aside from those in Quaternary-Recent time.1992, Anna K. Behrensmeyer, Robert W. Hook, “Paleoenvironmental Contexts and Taphonomic Modes”, in Terrestrial Ecosystems through Time, page 35:
Etymology From Latin alluvius (“alluvial”), from alluviō (“an overflowing, inundation”), from alluō (“wash against”). By surface analysis, alluvium + -ial.
1
A deposition of sediment over a long period of time by a river; an alluvial layer.
2
Alluvial soil; specifically, in Australia, gold-bearing alluvial soil.