mass noun
1- matter that settles to the bottom of a liquid; dregs沉淀物; 渣滓。
1.1
- Geology particulate matter that is carried by water or wind and deposited on the surface of the land or the seabed, and may in time become consolidated into rock【地质】沉积物。
no obj.
1- settle as sediment沉淀。
1.1
- (of a liquid) deposit a sediment（液体）沉淀。
1.2
- with obj. deposit (something) as a sediment沉积：
the DNA was sedimented by centrifugation
DNA被用离心过滤法沉淀下来
as adj. sedimented sedimented waste.沉积废物。
派生词
sedimentation
noun词源
mid 16th cent.: from French sédiment or Latin sedimentum 'settling', from sedere 'sit'.