What is to form a slough; to separate in the form of dead matter from the living tissues; -- often used with off, or away; as, a sloughing ulcer; the dead tissues slough off slowly called?

slough — To form a slough; to separate in the form of dead matter from the living tissues; -- often used with off, or away; as, a sloughing ulcer; the dead tissues slough off slowly. (Webster's 1913.)