Isatin
Pronunciation : I"sa*tin
Part of Speech : n.
Etymology : [See Isatis.] (Chem.)
Definition : Defn: An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also, less properly, isatine.]
Source : Webster's Unabridged Dictionary, 1913