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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A synthetic clear or amber-colored viscous insecticide, C19H26O3, similar to pyrethrin.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Either of a pair of related synthetic pyrethroids used in insecticides to paralyse the nervous system.


all(yl) + (pyr)ethrin.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • ThermaCELL utilizes allethrin, an artificial version of a natural insecticide found in chrysanthemum flowers.

    Denver Post: All Blogs


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