TRISOCTAHEDRON

\tɹˌa͡ɪsəktɐhˈiːdɹən], \tɹˌa‍ɪsəktɐhˈiːdɹən], \t_ɹ_ˌaɪ_s_ə_k_t_ɐ_h_ˈiː_d_ɹ_ə_n]\
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1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.