/ Dictionary / Index R RH: Meaning and Definition of Find definitions for: RH Pronunciation: [key] See Rh Pronunciation: [key] — Physiol. Physiol. See Rh Pronunciation: [key] — Symbol, Chem. rhodium. R.H. Pronunciation: [key] Royal Highness. r.h. Pronunciation: [key] right hand. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rh (Thesaurus) RGNP rhabdo- Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language