Definitions

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

  • n. An amber liquid, C12H21N2O3PS, used as an insecticide.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An organophosphorus insecticide used to control fleas etc.

Etymologies

diazin(e) + -on3.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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