a. Obs. [a. OF. crousteus, mod.F. croûteux, ad. L. crustōs-us (Pliny), f. crusta CRUST.] Of the nature of a crust or scab; crusty.
c. 1400. Lanfranc’s Cirurg., 350. Rotid fleisch & crustous.
1651. Biggs, New Disp., ¶ 238. Before the crustous eschar be taken away.
