Alluvium [ə-LOO-vee-əm]
Part of speech: noun
Origin: Latin, 17th century
1. A deposit of clay, silt, sand, and gravel left by flowing streams in a river valley or delta, typically producing fertile soil.
Examples of alluvium in a sentence
"Thanks to a layer of alluvium covering the ground, the valley was easy to walk through."
"Soil full of alluvium makes a fantastic garden."
