supercritical fluid 

https://doi.org/10.1351/goldbook.S06138
The defined state of a compound, mixture or element above its critical pressure (pc) and critical temperature (Tc).
Source:
PAC, 1993, 65, 2397. (Nomenclature for supercritical fluid chromatography and extraction (IUPAC Recommendations 1993)) on page 2399 [Terms] [Paper]
Citation: 'supercritical fluid' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S06138 RIS BibTex EndNote
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Last revised: February 24, 2014