Definition from Wiktionary, the free dictionary
reniform (not comparable)
- Shaped like a kidney; having a circular or roughly circular shape with a notch.
- (botany, of leaves) Shaped like a kidney, with the petiole attached at the notch.
- "reniform." The American Heritage Dictionary. Bartleby.com April 10, 2007. 
- ^ "reniform." Dictionary.com Unabridged (v 1.1). Random House, Inc. April 10, 2007.