heresiarch Hear it!

heresiarch Definition

he·resi·arch (hə rez′ē ärk′, -rē′zē-)

noun

the founder or head of a heresy or heretical sect

Etymology: LL(Ec) haeresiarcha < Gr hairesiarchēs, leader of a school < hairesis (see heresy) + -archēs, leader < archein, to begin, lead