/ Dictionary / Index R rachitis: Meaning and Definition of Find definitions for: ra•chi•tis Pronunciation: (ru-kī'tis), [key] — n. Pathol. rickets. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rachitis (Thesaurus) rachis Rachmaninoff Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language