/ Dictionary / Index R Rh positive: Meaning and Definition of Find definitions for: Rh pos•i•tive Pronunciation: (är'āch' poz'i-tiv). [key] See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rhotic rhubarb Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language