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.

Source : WordNet®

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