Correct spelling for the English word "Abevacuation" is [ɐbˌɛvɐkjuːˈe͡ɪʃən], [ɐbˌɛvɐkjuːˈeɪʃən], [ɐ_b_ˌɛ_v_ɐ_k_j_uː_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).
An abnormal evacuation in the way either of excess or of deficiency.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.