zest

n. [ F. zeste, probably fr. L. schistos split, cleft, divided, Gr. &unr_;, from &unr_; to split, cleave. Cf. Schism. ] [ 1913 Webster ]

1. A piece of orange or lemon peel, or the aromatic oil which may be squeezed from such peel, used to give flavor to liquor, etc. [ 1913 Webster ]

2. Hence, something that gives or enhances a pleasant taste, or the taste itself; an appetizer; also, keen enjoyment; relish; gusto. [ 1913 Webster ]

Almighty Vanity! to thee they owe
Their zest of pleasure, and their balm of woe. Young. [ 1913 Webster ]

Liberality of disposition and conduct gives the highest zest and relish to social intercourse. Gogan. [ 1913 Webster ]

3. The woody, thick skin inclosing the kernel of a walnut. [ Obs. ] [ 1913 Webster ]