Pronunciation: [ˌa͡ɪsətɐmˈa͡ɪ͡əntɪk] (IPA)
Correct spelling for the English word "isotamientic" is [ˌa͡ɪsətɐmˈa͡ɪ͡əntɪk], [ˌaɪsətɐmˈaɪəntɪk], [ˌaɪ_s_ə_t_ɐ_m_ˈaɪə_n_t_ɪ_k] (IPA phonetic alphabet).
Equally sparing.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.