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heresiarch

American  
[huh-ree-zee-ahrk, -see-, her-uh-see-] / həˈri ziˌɑrk, -si-, ˈhɛr ə si- /

noun

  1. a leader in heresy; the leader of a heretical sect.

heresiarch British  
/ hɪˈriːzɪˌɑːk /

noun

  1. the leader or originator of a heretical movement or sect

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of heresiarch

1615–25; < Late Latin haeresiarcha < Greek hairesiarchḗs the leader of a school, equivalent to haíresi ( s ) heresy + -archēs -arch

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.