critical point

1.

(Physics) That combination of volume and pressure, at the critical temperature of the substance, at which the liquid and gaseous phases of a given quantity of a substance have identical values for their densities and other properties.

Noun

1.

critical point - a crisis situation or point in time when a critical decision must be made; "at that juncture he had no idea what to do"; "he must be made to realize that the company stands at a critical point" Synonyms: crossroads, juncture

crisis, criticality, crossroads, juncture