nitric oxide
nitric oxide
nounDefinition of NITRIC OXIDE
: a poisonous colorless gas NO that occurs as a common air pollutant formed by the oxidation of atmospheric nitrogen and that is also formed by the oxidation of arginine in the mammalian body where it acts as a mediator of intracellular and intercellular communication regulating numerous biological processes (as vasodilation and neurotransmission)
Learn More About
Seen & Heard 
What made you want to look up nitric oxide? Please tell us where you read or heard it (including the quote, if possible).
