Sandy looked down at the contorted, blackened face, and his disappointment at having been forestalled, sedimented down.
The samples of milk are sedimented in a small centrifuge, and an examination of the sediment made with the microscope.
1540s, "matter which settles at the bottom of water or other liquid," from Middle French sédiment (16c.) and directly from Latin sedimentum "a settling, sinking down," from stem of sedere "to settle, sit" (see sedentary).
sediment sed·i·ment (sěd'ə-mənt)
Insoluble material that sinks to the bottom of a liquid, as in hypostasis.