Bible Dictionaries
Sulphindigotic

Webster's Dictionary

(a.) 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.

Bibliography Information
Webster, Noah. Entry for 'Sulphindigotic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/sulphindigotic.html. 1828.