DEPOSIT

[noun]Decant the wine carefully, so that you leave the deposit (= material which has separated out from the liquid) in the bottom of the bottle. [U]In hard-water areas, a chalky deposit (= layer) often forms in pipes and kettles. [C]The flood left a thick deposit (= layer) of mud over the whole of the ground floor of the house. [C](specialized) A deposit is a layer which has formed under the ground, esp. over a long period.The area has rich mineral and oil deposits.There is a huge coal deposit/deposit of coal in the valley.