Dictionary entry

Fraxin

Webster's Dictionary 1913

Frax″in (?), n. [From Fraxinus.] (Chem.) A colorless crystalline substance, regarded as a glucoside, and found in the bark of the ash (Fraxinus) and along with esculin in the bark of the horse-chestnut. It shows a delicate fluorescence in alkaline solutions; — called also paviin.