/ Dictionary / Index R reniform: Meaning and Definition of Find definitions for: ren•i•form Pronunciation: (ren'u-fôrm", rē'nu-), [key] — adj. kidney-shaped: a reniform leaf; hematite in reniform masses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reniform (Thesaurus) renifleur renin Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language