| Sediment 1. (n.) The matter which subsides to the bottom, from water or any other liquid; settlings; lees; dregs. 2. (n.) The material of which sedimentary rocks are formed. Thesaurus Entries alluvion, alluvium, ash, bottoms, cinder, clinker, debris, deposit, deposition, deposits, detritus, diluvium, draff, dregs, drift, dross, ember, feces, froth, grounds, lees, loess, moraine, offscum, precipitate, precipitation, remains, residue, residuum, scoria, scree, scum, sedimentate, settlings, silt, sinter, slag, smut, soot, sublimate |