A person who denies the existence of demons or evil spirits, or rejects demonological beliefs.
From Greek 'a-' (without) and 'daimon' (demon/spirit), plus '-ist' (believer/practitioner). The term describes someone who explicitly denies demons rather than simply being non-religious.
Ademonists in medieval times were actually pretty brave—they were going against the common belief that demons were everywhere causing mischief and illness!
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