heleninn.
/ˈhɛlɪnɪn/ Chemistry.
A colourless crystalline substance (C6H8O) obtained from the root of elecampane ( Inula helenium).
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1838 T. Thomson Chem. Org. Bodies 498 When the root of elecampane is distilled, the helenin passes with the water under the form of a yellowish oil.
1886 New Sydenham Soc. Lexicon (at cited word) According to Valenzuela, helenin is very useful in bronchitis.
Derivatives
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ˈhelenene n. a yellow oily hydrocarbon obtained by distilling helenin with phosphoric anhydride (Watts Dict. Chem. 1865).
This entry has not yet been fully updated (first published 1898; most recently modified version published online December 2019).
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n.1838