ENDOCARP
stone, pit, endocarp
(noun) 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”
Source: WordNet® 3.1
Etymology
Noun
endocarp (plural endocarps)
(botany) The woody inner layer of the pericarp of some fruits that contains the seed.
Source: Wiktionary
En"do*carp, n. Etym: [Endo- + Gr. endocarpe.] (Bot.)
Definition: The inner layer of a ripened or fructified ovary.
Source: Webster’s Unabridged Dictionary 1913 Edition