/ Dictionary / Index R radiative capture: Meaning and Definition of Find definitions for: ra'diative cap'ture Pronunciation: [key] — Physics. Physics. the capture of a particle, as a neutron, by a nucleus, inducing the emission of electromagnetic radiation, as a gamma ray. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiative radiator Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language