Pronunciation: [pɹˈə͡ʊsstɹəm] (IPA)
Correct spelling for the English word "procestrum" is [pɹˈə͡ʊsstɹəm], [pɹˈəʊsstɹəm], [p_ɹ_ˈəʊ_s_s_t_ɹ_ə_m] (IPA phonetic alphabet).
Proestrum.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Correct spelling for procestrum