/ Dictionary / Index R rho: Meaning and Definition of Find definitions for: rho Pronunciation: (rō), [key] — pl. rhos. the 17th letter of the Greek alphabet (P, &rgr;). the consonant sound represented by this letter. Rho. Pronunciation: [key] Rhodesia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rho (Thesaurus) Rh negative rhod- 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