Definition of helenalin
: a poisonous bitter crystalline compound C15H18O4 that is the active principle of sneezeweed
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Origin and Etymology of helenalin
helen- (from New Latin Helenium, genus name of the sneezeweed Helenium autumnale) + -al- (from New Latin autumnale, specific epithet of the sneezeweed Helenium autumnale) + -in
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