ˌsedəmən.ˈtāshən noun
( -s )
Etymology: sediment (I) + -ation
: the action or process of depositing sediment : settling ; also : the depositing especially by mechanical means of matter suspended in a liquid
the sedimentation of a water supply
broadly : the movement in any direction of solid particles through a fluid as a result of gravitational or other force — compare creaming