Greengage n. (Bot.) A kind of plum of medium size, roundish shape, greenish flesh, and delicious flavor. It is called in France Reine Claude, after the queen of Francis I. See Gage.
... first to enter the dining-room, she was generally the last to leave. Madame's appetite was as animated as her body was lethargic. She always drank her half-bottle of red wine to the dregs, and she invariably concluded with a greengage in brandy. So it was small marvel that, when at last she left her chair to "tortoise" upstairs, her complexion should be two shades ... — A Versailles Christmas-Tide • Mary Stuart Boyd