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- n. Plural form of grayanotoxin.
Sorry, no etymologies found.
The problem with mad honey is its concentration of substances called grayanotoxins, some of which can cause low blood pressure, slowed heart rate, vomiting, dizziness and fainting.
The most dangerous plants contain one of these three chemicals — solanine, grayanotoxins, and cardiac glycosides.
Honey from the Pontic region of eastern Turkey was notorious in ancient Greece and Rome; a local species of rhododendron carries “grayanotoxins,” which interfere with both lung and heart action.