An escharotic is a substance (such as acids, alkalis, carbon dioxide, or metallic salts) that causes the tissue to die and fall off.
Dorland's Online Medical Dictionary. Available at: www.dorlands.com/def.jsp?id=100036901. Accessed May 15, 2015.
Stedman's Online Medical Dictionary. Available at: www.stedmansonline.com/content.aspx?id=mlrE1900000183&termtype=t. Accessed May 15, 2015.