the solid material that settles at the bottom of a liquid 沉淀物 If milk is clean, there should be no sediment in the bottom of the bottle. 如果牛奶是干净的，则奶瓶底部不应有沉淀物。
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geology 地质学 sand, stones, mud, etc. carried by water or wind and left, for example, on the bottom of a lake, river, etc. 沉积物
Word Originmid 16th cent.: from French sédiment or Latin sedimentum ‘settling’, from sedere ‘sit’.