Webster's Revised Unabridged Dictionary · 1913

Alluvial

Alluvial , noun

Alluvial soil; specif., in Australia, gold-bearing alluvial soil.

Alluvial ({not transcribed}) , adjective

[Compare French alluvial. See Alluvion.]

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.