heresiology

[huh-ree-zee-ol-uh-jee, -see-, her-uh-see-]

noun, plural he·re·si·ol·o·gies for 2.

the study of heresies.
a heresiography.

Origin of heresiology

First recorded in 1855–60; heresy + -o- + -logy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019