noun hel·e·nalin \ˌheləˈnalə̇n, -nāl-\

Definition of helenalin



  1. :  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

Seen and Heard

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to criticize severely

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