Sulphindigotic
Pronunciation : Sulph*in`di*got"ic
Part of Speech : a.
Definition : Defn: Of, pertaining to, or designating, a sulphonic acid obtained, as a blue solution, by dissolving indigo in sulphuric acid; -- formerly called also cerulic sulphuric acid, but properly called indigo-disulphonic acid.
(Chem.)
Source : Webster's Unabridged Dictionary, 1913