DEFEMINATION

\dɪfˌɛmɪnˈe͡ɪʃən], \dɪfˌɛmɪnˈe‍ɪʃən], \d_ɪ_f_ˌɛ_m_ɪ_n_ˈeɪ_ʃ_ə_n]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe