ULCER
.—An ulcer is a wound, which, from long standing, and injudicious treatment, is become virulent and inveterate; having acquired a rigid callosity at the edges, and a discoloured, foul, unhealthy slough in the middle. These conjunctive appearances never submit to mere superficial digestive applications, but must be subdued by superficial scarification, and the milder class of corrosives and escharotics.