a combining form with the meaning "leader, bringer," of that named by the initial element, occurring in loanwords from Greek ( demagogue; pedagogue ); used also in medical terms that denote substances inducing the expulsion or secretion of that named by the initial element ( cholagogue; hemagogue ).
Also, -agog .
[ -agogos, -e, -on, akin to ágein to lead, c. L agere to lead, drive, ON aka to carry, convey ]