Sed"i*ment (?), n. [F. sédiment, L. sedimentum a settling, fr. sedere to sit, to settle. See Sit.] 1. The matter which subsides to the bottom, from water or any other liquid; settlings; lees; dregs.

2. (Geol.) The material of which sedimentary rocks are formed.

Sed"i*ment (?), n. [F. sédiment, L. sedimentum a settling, fr. sedere to sit, to settle. See Sit.] 1. The matter which subsides to the bottom, from water or any other liquid; settlings; lees; dregs.

2. (Geol.) The material of which sedimentary rocks are formed.

• Precipitate, particularly dirt that precipitates from a river.
       The Nile delta is composed of sediment that was washed down and deposited at the mouth of the river.