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Related to liquid oxygen: Liquid hydrogen
the clear pale blue liquid state of oxygen produced by liquefying air and allowing the nitrogen to evaporate: used in rocket fuels
liquid oxygen[′lik·wəd ′äk·sə·jən]
Oxygen that exists as a liquid at atmospheric pressure, at -182.97°C (90.18 K); a pale-blue, transparent, mobile liquid.
liquid oxygen (LOX)
Oxygen liquefied by cooling it below −297.4°F (−183°C). Liquid oxygen requires much less volume than gaseous oxygen. This is mainly used for breathing. In some aircraft, it is also used for inflating the g-suit. LOX cannot be stored for long periods.