alluvium

[ uh-loo-vee-uh m ]
/ əˈlu vi əm /

noun, plural al·lu·vi·ums, al·lu·vi·a [uh-loo-vee-uh] /əˈlu vi ə/.

a deposit of sand, mud, etc., formed by flowing water.
the sedimentary matter deposited thus within recent times, especially in the valleys of large rivers.

Nearby words

  1. alluvial,
  2. alluvial fan,
  3. alluvial mining,
  4. alluvial plain,
  5. alluvion,
  6. ally,
  7. allyl,
  8. allyl alcohol,
  9. allyl caproate,
  10. allyl chloride

Origin of alluvium

1655–65; < Latin, noun use of neuter of alluvius washed against, equivalent to alluv- (see alluvion) + -ius, -ium adj. suffix; see -ium

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for alluvium


British Dictionary definitions for alluvium

alluvium

/ (əˈluːvɪəm) /

noun plural -viums or -via (-vɪə)

a fine-grained fertile soil consisting of mud, silt, and sand deposited by flowing water on flood plains, in river beds, and in estuaries

Word Origin for alluvium

C17: from Latin; see alluvion

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 alluvium

alluvium

n.

"matter deposited by flowing water," 1660s, from Medieval Latin alluvium, neuter of alluvius "washed against," from Latin alluere "wash against," from ad- "to, against" (see ad-) + -luere, comb. form of lavere "to wash" (see lave).

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for alluvium

alluvium

[ ə-lōōvē-əm ]

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.