adjective Physics.
  1. of or relating to a particle, as a neutron or alpha particle, that is emitted from an excited nucleus formed in a nuclear reaction, the emission occurring some time after the reaction is completed.
Related formsun·de·layed, adjectivewell-de·layed, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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