METOL Meaning of METOL in English /mee"tawl, -tol/ , Chem., Trademark.a brand name for a colorless, water-soluble salt, C 14 H 20 N 2 O 6 S, used chiefly as a photographic developer. Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012