Definition from Wiktionary, the free dictionary
See also: métastable
metastable (not comparable)
- (physics, chemistry) Of or pertaining to a physical or chemical state that is relatively long-lived, but may decay to a lower energy state when slightly perturbed or through a quantum transition.
long-lived unstable state
metastable (plural metastables)
- A particle, etc. in the metastable state.