Criticality may refer to:
Physics terms
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Critical phenomena, the collective name associated with the physics of critical points
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Critical point (thermodynamics), the end point of a phase equilibrium curve
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Quantum critical point, a special class of continuous phase transition that takes place at absolute zero
Nuclear-physics terms
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Criticality (status), the state in which a nuclear chain reaction is self-sustaining
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Prompt criticality, the criticality that is achieved with Prompt neutron alone
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Critical mass, the minimum mass of the nuclear reactor's fissionable material that can achieve criticality
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Criticality accident, an uncontrolled nuclear chain reaction
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Nuclear criticality safety, the prevention of nuclear and radiation accidents resulting from an inadvertent, self-sustaining nuclear chain reaction
Other terms
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Critical thinking, in education
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Criticality index, in risk analysis
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Criticality matrix, a representation (often graphical) of failure modes along with their probabilities and severities
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Self-organized criticality, a property of (classes of) dynamical systems which have a critical point as an attractor
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Critical point
