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liquid oxygen (O2)
Oxygen in its liquid state, used as the oxidizer in many liquid-propellant rocket engines. Oxygen gas turns to liquid under standard atmospheric pressure at -183°C. Molecular weight: 32; density: 1.141 g/ml. Commonly referred to in rocketry as LOX.
Related entries
• liquid hydrogen
• cryogenic propellant
Related category
• PROPELLANTS
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