Correct spelling for the English word "tannothymal" is [tˈanəθˌɪmə͡l], [tˈanəθˌɪməl], [t_ˈa_n_ə_θ_ˌɪ_m_əl] (IPA phonetic alphabet).
Proprietary name of a mixture of tannic acid, formaldehyde, and thymol; employed in diarrhea in doses of 5-15 grains (0.3-1.0).
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.