Alluvial /(?)/
Al·lu·vi·al
Alluvial
n.
- Alluvial soil; specif., in Australia, gold-bearing alluvial soil.
Alluvial
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.