Metastable

Nonequilibrium state that may persist for a very long time, a longer life time than that of regular excited states. This can be:

  1. nonequilibrium state of a material with respect to some transition, conversion, or reaction but stabilized kinetically either by rapid cooling or by some molecular characteristics
  2. possessing a state of pseudoequilibrium that has a free energy higher than that of the true equilibrium state

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Subjects: Physics