Suc′ce‐da″ne‐um (?), n.; pl.Succedanea (#). [NL. See Succedaneous.] 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. Walpole.