/ Dictionary / Index P perfect radiator: Meaning and Definition of Find definitions for: per'fect ra'diator Pronunciation: [key] — Physics. Physics. blackbody. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perfect progressive perfect ream Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language