al·lu·vi·al /əˈluviəl/
(a.)沖積的
Al·lu·vi·al n. Alluvial soil; specif., in Australia, gold-bearing alluvial soil.
Al·lu·vi·al a. Pertaining to, contained in, or composed of, alluvium; relating to the deposits made by flowing water; washed away from one place and deposited in another; as, alluvial soil, mud, accumulations, deposits.
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alluvial
adj : of or relating to alluvium