The Collaborative International Dictionary of English v.0.48:

Pericarp \Per"i*carp\, n. [Gr. perika`rpion; peri` around +
   karpo`s fruit: cf. F. p['e]ricarpe.] (Bot.)
   The ripened ovary; the walls of the fruit. See Illusts. of
   Capsule, Drupe, and Legume.
   [1913 Webster] Pericarpial

WordNet (r) 3.0 (2006):

pericarp
    n 1: the ripened and variously modified walls of a plant ovary
         [syn: pericarp, seed vessel]