A bitter compound or alkaloid found in dragon's blood resin, used historically in medicine and as a dye.
From dragon's blood (the resin from Dracaena draco) combined with the chemical suffix -in used for organic compounds and alkaloids. The word reflects the traditional association between dragon imagery and exotic plant resins.
Dragon's blood isn't actually from dragons—it's a deep red resin from African trees that medieval Europeans thought looked so exotic it had to be magical, and the compounds within it like dracin were literally alchemists' treasure!
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