Definition of rotenone in English:


Syllabification: ro·te·none
Pronunciation: /ˈrōtnˌōn


  • A toxic crystalline substance obtained from the roots of derris and related plants, widely used as an insecticide.
    • A polycyclic ketone; chemical formula: C23H22O6
    More example sentences
    • By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
    • Use insecticidal soap sprays or rotenone to kill this pest.
    • A hard spray of water will knock some bugs off the plants and a dusting of a non-toxic substance called rotenone shuts off their breathing mechanism.


1920s: from Japanese rotenon (from roten 'derris') + -one.

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