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.
© Webster 1913.