Source : Webster's Revised Unabridged Dictionary (1913)

Exocarp \Ex"o*carp\, n. [Exo- + Gr. ? fruit.] (Bot.)
   The outer portion of a fruit, as the flesh of a peach or the
   rind of an orange. See Illust. of {Drupe}.

Source : WordNet®

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