Succedaneum n. (pl. succedanea) One who, or that which, succeeds to the place of another; that which is used for something else; a substitute; specifically (Med.), A remedy used as a substitute for another. "In lieu of me, you will have a very charming succedaneum, Lady Harriet Stanhope."
... had not. It had not been ordered by Mr. Rerechild, the Barchester doctor whom she employed; and then the young mother mentioned some shockingly modern succedaneum which Mr. Rerechild's new lights had taught ... — Barchester Towers • Anthony Trollope