DRUPE ( Fr., from Lat. drupa, Gk. δρύππα, dryppa, overripe olive, from δρυπεπής, drypepēs, ripened on the tree, from δρῦς, drys, tree + πέπτειν, peptein, to cook, or δρυπετής, drypetēs, fallen from the tree, from δρῦς, drys, tree + πιπτειν, piptein, to fall). A stone-fruit, in which the ovary wall, in forming the pericarp, develops an outer fleshy layer and an inner stony or bony layer, as in the peach, plum, cherry, etc. See Fruit. For illustration, see Plate of Drupes.