noun
critical pressure
Technical term in physics and engineering; the pressure at which a substance's liquid and gas phases become indistinguishable.
水の臨界圧力は約22.1メガパスカルです。
The critical pressure of water is about 22.1 megapascals.
Critical temperature, the temperature above which a gas cannot be liquefied by pressure alone; often discussed together with critical pressure.
Critical point, the specific temperature and pressure at which the liquid and gas phases have the same density; a broader concept that includes critical pressure.
Compound of 臨界 (critical, from 臨 'face' and 界 'boundary') and 圧力 (pressure). A modern technical term likely calqued from English 'critical pressure'.