helenalin

noun

hel·​e·​nalin

ˌheləˈnalə̇n,

-nāl-

plural -s

: a poisonous bitter crystalline compound C₁₅H₁₈O₄ that is the active principle of sneezeweed

Word History

Etymology

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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