/ Dictionary / Index R radiological: Meaning and Definition of Find definitions for: ra•di•o•log•i•cal Pronunciation: (rā"dē-u-loj'i-kul), [key] — adj. of or pertaining to radiology. involving radioactive materials: radiological warfare. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radiological (Thesaurus) radiolocator radiology 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