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Fine Dictionary

fraxin

Webster's Revised Unabridged Dictionary
  1. fraxin
    (Chem) A colorless crystalline substance (C16H18O10) found in the bark of the ash (Fraxinus), and along with esculin in the bark of the horse-chestnut. It is structurally a derivative of a coumarin glucoside. It shows a delicate blue-green fluorescence in alkaline solutions; -- called also paviin and fraxoside.
Century Dictionary and Cyclopedia
  1. (n) fraxin
    A glucoside (C21H22O13) found in the bark of the common ash-tree, Fraxinus excelsior, and of the horse-chestnut.
Etymology

Webster's Revised Unabridged Dictionary From Fraxinus