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heresiologist

American  
[huh-ree-zee-ol-uh-jist, -see-, her-uh-see-] / həˌri ziˈɒl ə dʒɪst, -si-, ˌhɛr ə si- /

noun

  1. a person who studies or writes about heresies.


Etymology

Origin of heresiologist

First recorded in 1700–10; heresy + -o- + -log(y) + -ist