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
See also Critical value (disambiguation) Critical path (disambiguation) Brillouin zone Percolation thresholds