1 of or relating to alluvium
2 another name for →
3 (Austral. and N.Z.) alluvium containing any heavy mineral, esp. gold
alluvial fan , cone
n a fan-shaped accumulation of silt, sand, gravel, and boulders deposited by fast-flowing mountain rivers when they reach flatter land
n a method of extracting minerals by dredging alluvial deposits
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"