al·​lu·​vi·​um | \ ə-ˈlü-vē-əm How to pronounce alluvium (audio) \
plural alluviums or alluvia\ ə-​ˈlü-​vē-​ə How to pronounce alluvium (audio) \

Definition of alluvium

: clay, silt, sand, gravel, or similar detrital material deposited by running water

Examples of alluvium in a Sentence

Recent Examples on the Web Scott traces their advent to a few hundred years later, in a constellation of cities that sprang up on the Mesopotamian alluvium around what was then the northern end of the Persian Gulf. Tim Flannery, The New York Review of Books, "The First Mean Streets," 25 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'alluvium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of alluvium

1810, in the meaning defined above

History and Etymology for alluvium

Medieval Latin, alteration of Latin alluvio

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The first known use of alluvium was in 1810

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Cite this Entry

“Alluvium.” Dictionary, Merriam-Webster, Accessed 12 May. 2021.

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