oxygen
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- n a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
- The world record for holding your breath after inhaling pure oxygen is now Blaine's 17 minutes and 4 seconds.
- Extra oxygen given too soon, she warned, may damage the brain as surely as the lack of oxygen ultimately does in normal death.
- THE deaths of the astronauts brought to a head longstanding differences between advocates of pure-oxygen atmospheres for spacecraft and those who favor a two-gas system.