Crusta

An Illustrated Dictionary of Medicine, Biology and Allied Sciences · 1907 · p. 10

(krus'-tah). The ectal portion of the cms cerebri. C. lactea. See Achor. Also synonym for Eczema. C. petrosa, a thin layer of bone covering the fang of a tooth. C. phlogistic a, the yellowish layer of the upper stratum of a blood clot coagulating slowly.