The Collaborative International Dictionary of English v.0.48:
Epicarp \Ep"i*carp\, [Pref. epi- + Gr. ? fruit.] (Bot.) The external or outermost layer of a fructified or ripened ovary. See Illust. under Endocarp. [1913 Webster]WordNet (r) 3.0 (2006):
epicarp n 1: outermost layer of the pericarp of fruits as the skin of a peach or grape [syn: epicarp, exocarp]