The Collaborative International Dictionary
Sulphionide
Sulphionide \Sulph*i"on*ide\, n. (Chem.) A binary compound of sulphion, or one so regarded; thus, sulphuric acid, H2SO4, is a sulphionide.
Wiktionary
sulphionide
n. (context chemistry English) A binary compound of sulphion, or one so regarded.