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1. Oxford American Dictionary

   nitrogen monoxide

   • IPA[ˈnītrəjən məˈnäkˌsīd]

   • n.
     another term for nitric oxide

   • noun: nitrogen monoxide

2. • 更多解釋

   nitrogen monoxide

   • n.
     a colourless toxic gas formed in many reactions in which nitric acid is reduced. It reacts ...

   Oxford Dictionary