Definition of "cacodemon" [cac•o•de•mon]

• An evil or malevolent spirit. (noun)
• The twelfth astrological House, from which only evil prognostics are alleged to proceed. (noun)

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• "But his cacodemon is puny and he himself absolutely crumples once in Fillory."
• "(presumably with ID numbers), so you just lined up the imp/cacodemon/whatever which represented a rogue thread, and let 'em have it with both barrels."