Correct spelling for the English word "eclampsism" is [ɪklˈampsɪzəm], [ɪklˈampsɪzəm], [ɪ_k_l_ˈa_m_p_s_ɪ_z_ə_m] (IPA phonetic alphabet).
A state in which the general signs point to the early occurrence of puerperal eclampsia, but convulsions do not take place.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.