[uh-loo-vee-uh l]


of or relating to alluvium.


alluvial soil.
Australia. gold-bearing alluvial soil.

Origin of alluvial

First recorded in 1795–1805; alluvi(um) + -al1
Related formsnon·al·lu·vi·al, adjective, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for alluvial

Contemporary Examples of alluvial

Historical Examples of alluvial

  • The Alluvial Lands, which may be subdivided into the cotton and cane districts.

    The Negro Farmer

    Carl Kelsey

  • The city was built in the midst of an alluvial country, far removed from the hills.

  • The alluvial soil of these islands is a marvel of fertility.

    Holland, v. 1 (of 2)

    Edmondo de Amicis

  • The town lay at the sea's edge on a strip of alluvial coast.

  • It was an alluvial town, called Soledad, where there was no harbour or future or recourse.

British Dictionary definitions for alluvial



of or relating to alluvium


another name for alluvium
Australian and NZ alluvium containing any heavy mineral, esp gold
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for alluvial

1802, from Latin alluvius "alluvial" (see alluvium) + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper

alluvial in Science



Plural alluviums alluvia

Sand, silt, clay, gravel, or other matter deposited by flowing water, as in a riverbed, floodplain, delta, or alluvial fan. Alluvium is generally considered a young deposit in terms of geologic time.
Related formsalluvial adjective
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.