delta

n. (河流的)三角洲

There are fertile fields in the Nile Delta.

尼罗河三角洲土地肥沃。

Sediment deposited by flowing water, as in a riverbed, flood plain, or delta.

冲积层河床、洪水淹没的平原或三角洲中的流水淤积所产生的沉积层