The state or condition of being possessed by or influenced by evil spirits; demonic possession or influence.
From 'cacodemon' + '-ia' suffix (condition/state). This noun form describes the actual affliction or presence of evil spirits.
Cacodemonia was a serious medical diagnosis in medieval Europe—doctors actually treated it with remedies, exorcisms, and bloodletting, proving they genuinely believed in it as a real physical condition!
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