Source : Webster's Revised Unabridged Dictionary (1913)

Mezereon \Me*ze"re*on\, n. [F. m['e]z['e]r['e]on, Per.
   m[=a]zriy[=u]n.] (Bot.)
   A small European shrub ({Daphne Mezereum}), whose acrid bark
   is used in medicine.

Umbelliferone \Um`bel*lif"er*one\, n. (Chem.)
   A tasteless white crystalline substance, {C9H6O3}, found in
   the bark of a certain plant ({Daphne Mezereum}), and also
   obtained by the distillation of certain gums from the
   {Umbellifer[ae]}, as galbanum, asafetida, etc. It is
   analogous to coumarin. Called also {hydroxy-coumarin}.

Source : WordNet®

Daphne mezereum
     n : small European deciduous shrub with fragrant lilac-colored
         flowers followed by red berries on highly toxic twigs
         [syn: {mezereon}, {February daphne}]