Correct spelling for the English word "Idorgan" is [ˈa͡ɪdɔːɡən], [ˈaɪdɔːɡən], [ˈaɪ_d_ɔː_ɡ_ə_n] (IPA phonetic alphabet).
A plastid or unicellular organism, theoretically capable of development into a metazoan.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.