Webster's English Dictionary

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drupe

drupe \'dru:p\ n [NL drupa, fr. L, overripe olive, fr. Gk dryppa olive] : a 
   one-seeded indehiscent fruit having a hard bony endocarp, a fleshy mes 
   ocarp, and a thin epicarp that is flexible (as in the cherry) or dry and 
   almost leathery (as in the almond)