Rashing off helms and riving plates asunder.
Spenser.
Rash, n. [OF. rasche an eruption, scurf, F. rache; fr. (assumed) LL.
rasicare to scratch, fr. L. radere, rasum, to scrape, scratch, shave.
See Rase, and cf. Rascal.] (Med.) A fine eruption or efflorescence on
the body, with little or no elevation.
Canker rash. See in the Vocabulary. -- Nettle rash. See Urticaria. --
Rose rash. See Roseola. -- Tooth rash. See Red-gum.
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.
Rash, a. [Compar. Rasher (-r); superl. Rashest.] [Probably of Scand.
origin; cf. Dan. & Sw. rask quick, brisk, rash, Icel. röskr vigorous,
brave, akin to D. & G. rasch quick, of uncertain origin.] 1. Sudden in
action; quick; hasty. [Obs.] "Strong as aconitum or rash gunpowder."
Shak.