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her·e·sy  audio  (hr-s) KEY 

pl. her·e·sies
    1. An opinion or a doctrine at variance with established religious beliefs, especially dissension from or denial of Roman Catholic dogma by a professed believer or baptized church member.
    2. Adherence to such dissenting opinion or doctrine.
    1. A controversial or unorthodox opinion or doctrine, as in politics, philosophy, or science.
    2. Adherence to such controversial or unorthodox opinion.

Middle English heresie, from Old French, from Late Latin haeresis, from Late Greek hairesis, from Greek, a choosing, faction, from haireisthai, to choose, middle voice of hairein, to take

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