From WordNet (r) 2.0 (August 2003) [wn]:
endocarp
n : the hard inner (usually woody) layer of the pericarp of some
fruits (as peaches or plums or cherries or olives) that
contains the seed; "you should remove the stones from
prunes before cooking" [syn: stone, pit]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Endocarp \En"do*carp\, n. [Endo- + Gr. ? fruit: cf. F.
endocarpe.] (Bot.)
The inner layer of a ripened or fructified ovary.
[1913 Webster]