The chemical symbol for nitrous oxide which is 2 molocules Nitrogen and 1 Oxygen. Used in internal combustion engines for a quick boost in horsepower. Usually incoorectly called Nos
Look at that! It says n20!
Gaseous oxide of nitrogen capable of deadening perception of pain and finally producing unconsciousness: Used as inhalation anesthetic during dental and other procedures, as a propellant in whipped-cream dispensers and often abused as a recreational drug (laughing gas).
Nitrous Oxide was discovered in 1800 by chemist Humphrey Davy, who first suggested its use as an anesthetic.