Merriam-Webster's Collegiate® Dictionary, 11th Edition
SEDIMENT
I. noun
Etymology: Latin sedimentum settling, from sedēre to sit, sink down
Date: 1547
the matter that settles to the bottom of a liquid, material deposited by water, wind, or glaciers, II.
Date: 1859
transitive verb to deposit as sediment, intransitive verb to settle to the bottom in a liquid, to deposit sediment