/ Dictionary / Index R rā: Meaning and Definition of Find definitions for: rā Pronunciation: (rä), [key] — n. the 10th letter of the Arabic alphabet. Ra Pronunciation: (rä), [key] — n. Egyptian Religion. a sun god of Heliopolis, a universal creator worshiped throughout Egypt (typically represented as a hawk-headed man bearing on his head the solar disk and the uraeus). RA Pronunciation: [key] regular army. Ra Pronunciation: [key] — Symbol, Chem. radium. R.A. Pronunciation: [key] rear admiral. right ascension. royal academician. Royal Academy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ra (Thesaurus) R, r raab 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