Correct spelling for the English word "chroatol" is [kɹˈə͡ʊtɒl], [kɹˈəʊtɒl], [k_ɹ_ˈəʊ_t_ɒ_l] (IPA phonetic alphabet).
Terpin iodohydrate, C10H15(HI)2; occurs in greenish yellow crystalline masses; employed externally, in powder or ointment, in the treatment of psoriasis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.