TYMPANOHYAL

\tˈɪmpɐnˌə͡ʊɪə͡l], \tˈɪmpɐnˌə‍ʊɪə‍l], \t_ˈɪ_m_p_ɐ_n_ˌəʊ_ɪ__əl]\
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1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland