alluviation

noun

al·​lu·​vi·​a·​tion

plural -s

: the process that results in deposits of clay, silt, sand, or gravel at places in rivers or estuaries, or along the shores of lakes or seas, where stream velocity is decreased

Word History

First Known Use

1791, in the meaning defined above

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now