A bitter chemical compound extracted from the Euonymus plant, historically used in traditional medicine and herbalism.
From Euonymus (plant genus) + -in (chemical suffix). Euonymus comes from Greek eu- (well) + onoma (name), 'well-named tree.'
Euonymin is why some plants taste terrible—it's a defense chemical that makes the plant poisonous to animals, and traditional healers discovered that this same bitterness could treat parasites and digestive issues.
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