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al·​lu·​vi·​al ə-ˈlü-vē-əl How to pronounce alluvial (audio)
: relating to, composed of, or found in alluvium
alluvial soil
alluvial diamonds


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: an alluvial deposit

Example Sentences

Recent Examples on the Web
Located about 10 miles to the west of Mount Vesuvius, the ancient village of Afragola was covered in a sheet of ash, silt and alluvial sediments when the volcano erupted around 4,000 years ago. Sam Walters, Discover Magazine, 3 Oct. 2022 There's the rich alluvial soil of the Delta, appreciation for good catfish and barbecue, perhaps an inferiority complex or two, politics of the conservative nature, and the Liberty Bowl. Arkansas Online, 12 Dec. 2022 In El Paso, Frontera’s central quest is to get the Castner Range, a seven-thousand-acre stretch of alluvial fans and a broad, high desert field, designated as a national monument. Rachel Monroe, The New Yorker, 3 Dec. 2022 Residents of La Toma have long practiced both alluvial mining — panning in the Ovejas for gold washed down from the hills — and digging for ore in tunnels cut deep into dirt and rock. Patrick J. Mcdonnellforeign Correspondent, Los Angeles Times, 25 Sep. 2022 Stands of honey mesquite, towering cottonwoods and willows anchored alluvial lands made fertile by muddy deposits left behind by the river., 8 Aug. 2022 Lucapa said the Lulo Rose is believed to be the biggest pink diamond recovered in the last 300 years and the fifth-largest diamond ever discovered at the Lulo alluvial mine, where the stones are extracted from a riverbed. Morgan Winsor, ABC News, 28 July 2022 In alluvial diamond mining, stones are recovered from gravel and sand found on riverbeds. Kathleen Magramo, CNN, 27 July 2022 With a staff of 400, Lulo is an alluvial mine where stones are recovered from the river bed. Demetrius Simms, Robb Report, 28 July 2022
Key to that fight is destroying and seizing the costly heavy machinery that’s being used in the operations — most blatantly the diggers and dredges employed in riverside, or alluvial, mining. Jim Wyss And Kyra Gurney, miamiherald, 16 Jan. 2018 See More

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

Word History

First Known Use


1771, in the meaning defined above


1816, in the meaning defined above

Time Traveler
The first known use of alluvial was in 1771

Dictionary Entries Near alluvial

Cite this Entry

“Alluvial.” Dictionary, Merriam-Webster, Accessed 27 Jan. 2023.

Kids Definition


: relating to, composed of, or found in alluvium

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