Correct spelling for the English word "defemination" is [dɪfˌɛmɪnˈe͡ɪʃən], [dɪfˌɛmɪnˈeɪʃən], [d_ɪ_f_ˌɛ_m_ɪ_n_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
A weakening or loss of feminine characteristics.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.