Source : Webster's Revised Unabridged Dictionary (1913)

Peucedanin \Peu*ced"a*nin\, n. (Chem.)
   A tasteless white crystalline substance, extracted from the
   roots of the sulphurwort ({Peucedanum}), masterwort
   ({Imperatoria}), and other related plants; -- called also
   {imperatorin}.