Nitric Oxide

**Semantic type:** Biologically Active Substance|Inorganic Chemical

**Definition:** An unstable free-radical gas which reacts rapidly with oxygen to form nitrogen oxides. Water soluble, NO is produced normally in numerous tissues and is considered to be a mediator of cell-to cell communication; it functions in numerous processes including vasodilation, inflammation, and neurotransmission. (NCI04)

**Synonyms:** - EDRF - Endothelium-Derived Relaxing Factor - Inomax - Mononitrogen Monoxide - NITRIC OXIDE - NO - Nitrogen Monoxide - Nitrogen Oxide