Drupe n. (Bot.) A fruit consisting of pulpy, coriaceous, or fibrous exocarp, without valves, containing a nut or stone with a kernel. The exocarp is succulent in the plum, cherry, apricot, peach, etc.; dry and subcoriaceous in the almond; and fibrous in the cocoanut.
... know what your peach is, that it is the fruit of a rosal exogen, and is of the nature of a true drupe, with its carpel solitary, and its style proceeding from the apex,—that its ovules are anatropal, and that its putamen separates sponte sua from the sacrocarp; to know, moreover, how many kinds of peaches and nectarines there are in the world, and how happy the Canadian ... — Spare Hours • John Brown