al|lu|vi|al

al|lu|vi|al «uh LOO vee uhl», adjective, noun.

–adj.

1. consisting of, or formed by sand, silt, or mud left by flowing water: »

an alluvial plain. A delta is an alluvial deposit at the mouth of a river.

2. found in silt or sand (alluvium) left by flowing water.

–n.

alluvial soil: »

to pan for alluvial gold.