EMISSARIUM MASTOIDEUM

\ˌɛmɪsˈe͡əɹi͡əm mˌastɔ͡ɪdˈiːəm], \ˌɛmɪsˈe‍əɹi‍əm mˌastɔ‍ɪdˈiːəm], \ˌɛ_m_ɪ_s_ˈeə_ɹ_iə_m m_ˌa_s_t_ɔɪ_d_ˈiː__ə_m]\
Sort: Oldest first
 
1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe