Origin: 1635–45; < Neo-Latin succēdāneum, noun use of neuter singular of Latin succēdāneus substituted, equivalent to suc-suc- + cēd(ere) to come, go (see cede) + -āneus composite adj. suffix, equivalent to -ān(us) -an + -eus-eous
"substitute," 1643, from L. neut. of succedaneus "succeeding, acting as substitute" (see succeed). Especially of inferior drugs substituted for better ones.