nitric oxide

chemical compound

Nitric oxide or Nitrogen monoxide is a chemical compound with chemical formula NO. This gas is an important signaling molecule in the body of mammals including humans and is an extremely important intermediate in the chemical industry. It is also a toxic air pollutant produced by automobile engines and power plants.
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Nitric oxide A multifaceted bioregulatory agent and environmental pollutant, capable of causing genotoxicity Environment A gas byproduct of high [more]Nitric oxide - Community and Resources

Noun
1. a poisonous red-brown gas (NO)
(hypernym) gas

A gas formed by combustion under high temperature and high pressure in an internal combustion engine; it is converted by sunlight and photochemical processes in ambient air to nitrogen oxide. NO is a precursor of ground-level ozone pollution, or smog..