predissociation

noun
pre·dissociation | \"+\

Definition of predissociation 

: the transition without emission of radiation of a molecule from a stable excited state to an unstable excited state that leads to dissociation

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First Known Use of predissociation

1924, in the meaning defined above

History and Etymology for predissociation

pre- + dissociation

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The first known use of predissociation was in 1924

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