Dictionary.net

• Tri-iodo-cresol; a crystalline substance, C6HI3 (CH3).OH, used in parasitic skin diseases and in acne.

1900 - A dictionary of medicine and the allied sciences
By Alexander Duane

• Tri-iodometacresol; used topically in skin diseases.

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe