ˌthīyəˈrōnēəm noun
also thio·uro·ni·um ˌthīōyəˈr-
( -s )
Etymology: thiur- (as in thiuram ) or thiour- (as in thiourea ) + -onium
: the cation [HSC(NH 2 ) 2 ] + resulting from addition of a proton to thiourea ; especially : any of its derivatives formed by adding organic halides to thiourea