| Loess (n.) A quaternary deposit, usually consisting of a fine yellowish earth, on the banks of the Rhine and other large rivers. Thesaurus Entries alluvion, alluvium, ash, cinder, clinker, debris, deposit, deposition, deposits, detritus, diluvium, draff, dregs, drift, dross, ember, feces, froth, grounds, lees, moraine, offscum, precipitate, precipitation, scoria, scree, scum, sediment, settlings, silt, sinter, slag, smut, soot, sublimate | ![]() |