-di·thi·o·ic
\|dīˌthī|ōik\  adjective combining form 
Etymology: International Scientific Vocabulary dithi- + -ic 
 : containing two atoms of sulfur replacing two oxygen atoms in the molecule of an acid 
< phosphorodithioic acid H3PO2S2 >
< phosphorodithioic acid H3PO2S2 >