Correct spelling for the English word "invermination" is [ɪnvˌɜːmɪnˈe͡ɪʃən], [ɪnvˌɜːmɪnˈeɪʃən], [ɪ_n_v_ˌɜː_m_ɪ_n_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
Helminthiasis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
A diseased state of the bowels caused by worms.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.