Webster's Revised Unabridged Dictionary · 1913

Dithionic

Dithionic , adjective

[Prefix di- + -thionic.]

(Chemistry) Containing two equivalents of sulphur; as, dithionic acid.
Collocations (1)
Dithionic acid (Chemistry) , an unstable substance, H2S2O6, known only in its solutions, and in certain well-defined salts.