- A colorless, tasteless, odorless, gaseous element occurring
in the free state in the atmosphere, of which it forms about 23 per
cent by weight and about 21 per cent by volume, being slightly heavier
than nitrogen. Symbol O. Atomic weight 15.96. - Chlorine used in bleaching.
Oxygen sensor Oxygen sensor in a computer-controlled, fuel-injected vehicle, a sensor mounted in the exhaust stream that relays air/fuel ratio information to the
Definition
[ n.]