Source : Webster's Revised Unabridged Dictionary (1913)

Succedaneous \Suc`ce*da"ne*ous\, a. [L. succedaneus. See
   {Succeed}.]
   Pertaining to, or acting as, a succedaneum; supplying the
   place of something else; being, or employed as, a substitute
   for another. --Sir T. Browne.