Definition of alluvium noun from the Oxford Advanced Learner's Dictionary



BrE BrE//əˈluːviəm//
; NAmE NAmE//əˈluːviəm//
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sand and earth that is left by rivers or floods Word Origin mid 17th cent.: Latin, neuter of alluvius ‘washed against’, from ad- ‘towards’ + luere ‘to wash’.
See the Oxford Advanced American Dictionary entry: alluvium