rash

Rash \Rash\, n. [Cf. F. ras short-nap cloth, It. & Sp. raso satin (cf. {Rase}); or cf. It. rascia serge, G. rasch, probably fr. Arras in France (cf. {Arras}).] An inferior kind of silk, or mixture of silk and worsted. [Obs.] --Donne. [1913 Webster]