critical pressure, \(p_{\text{c}}\)
The minimum pressure which would suffice to liquefy a substance at its critical temperature. Above the critical pressure, increasing the temperature will not cause a fluid to vaporize to give a two-phase system.
PAC, 1993, 65, 2397. 'Nomenclature for supercritical fluid chromatography and extraction (IUPAC Recommendations 1993)' on page 2399 (