Correct spelling for the English word "arthigon" is [ˈɑːθɪɡən], [ˈɑːθɪɡən], [ˈɑː_θ_ɪ_ɡ_ə_n] (IPA phonetic alphabet).
Trade name of a gonococcus stock vaccine containing 20 million to the cubic centimeter.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.