Source : Webster's Revised Unabridged Dictionary (1913)

Epicarp \Ep"i*carp\, [Pref. epi- + Gr. ? fruit.] (Bot.)
   The external or outermost layer of a fructified or ripened
   ovary. See Illust. under {Endocarp}.

Source : WordNet®

epicarp
     n : outermost layer of the pericarp of fruits as the skin of a
         peach or grape [syn: {exocarp}]