Tetrathionic

• (a.) Of, pertaining to, or designating, a thionic derivative, H/S/O/, of sulphuric acid, obtained as a colorless, odorless liquid.
Found on http://thinkexist.com/dictionary/meaning/tetrathionic/

Tetrathionic

Tet`ra·thi·on'ic adjective [ Tetra- + thionic .] (Chemistry) Of, pertaining to, or designating, a thionic derivative, H 2 S 4 O 6 , of sulphuric acid, obtained as a colorless, odorless liquid.
Found on http://www.encyclo.co.uk/webster/T/35
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