Correct spelling for the English word "iodoval" is [ˈa͡ɪədˌuːvə͡l], [ˈaɪədˌuːvəl], [ˈaɪ_ə_d_ˌuː_v_əl] (IPA phonetic alphabet).
Trade name of a preparation of iodine, alpha-mono-iodisovalerylurea, employed as a substitute for the iodides.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.