Critical point

{{wiktionary|critical point}}

Critical point may refer to:

• Critical phenomena in physics
• Critical point (mathematics), in calculus, a point where a function's derivative is either zero or nonexistent
• Critical point (set theory), an elementary embedding of a transitive class into another transitive class which is the smallest ordinal which is not mapped to itself
• Critical point (thermodynamics), a temperature and pressure of a material beyond which there is no longer any difference between the liquid and gas phases
• Quantum critical point
• Critical point (network science)
• Construction point, in skiing, a line that represents the steepest point on a hill