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Of, relating to, or being an unstable but relatively long-lived state of a chemical or physical system, as of a supersaturated solution or an excited atom.
met′a·sta·bil′i·ty (-stə-bĭl′ĭ-tē) n.
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|Noun||1.||metastability - the quality of a physical system that persists in its existing equilibrium when undisturbed (or only slightly disturbed) but able to pass to a more stable equilibrium when sufficiently disturbed|
constancy, stability - the quality of being enduring and free from change or variation; "early mariners relied on the constancy of the trade winds"