Peach pit, e.g

• Peach pit, e.g.
• Pit surrounding a plum seed
• The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Endocarp \En"do*carp\, n. [Endo- + Gr. ? fruit: cf. F. endocarpe.] (Bot.) The inner layer of a ripened or fructified ovary.

WordNet Word definitions in WordNet
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 ]

Wiktionary Word definitions in Wiktionary
n. (context botany English) The woody inner layer of the pericarp of some fruits that contains the seed.