Correct spelling for the English word "amelification" is [ɐmˌiːlɪfɪkˈe͡ɪʃən], [ɐmˌiːlɪfɪkˈeɪʃən], [ɐ_m_ˌiː_l_ɪ_f_ɪ_k_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
Formation of the enamel of the teeth.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.