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