Definition of critical temperature in English:

critical temperature


  • The temperature of a gas or vapor in its critical state. Above this temperature, a gas cannot be liquefied by pressure alone.

    • ‘Some authors use the term ‘fluids' for common gases and liquids; others restrict the noun ‘fluid’ to volatile substances at temperatures above their critical temperatures.’
    • ‘This question cannot be addressed in the laboratory setting because it is impossible to prevent phase separation at temperatures below the critical temperature of mixtures lying between the coexistence curves.’
    • ‘The critical temperature of water is 705.3°F.’
    • ‘Replacing the water with alcohol and evaporating the alcohol above its critical temperature results in a silica aerogel, in which the original arrangement of silica particles is retained.’
    • ‘At some critical temperatures, nuclear fusion will begin to occur.’