kidney-shaped

from WordNet (r) 3.0 (2006)

kidney-shaped
    adj 1: (of a leaf or bean shape) resembling the shape of kidney
           [syn: {reniform}, {kidney-shaped}]

from The Collaborative International Dictionary of English v.0.48

Kidney-form \Kid"ney-form`\, Kidney-shaped \Kid"ney-shaped`\, a.
   Having the form or shape of a kidney; reniform; as, a
   kidney-shaped leaf; a kidney-shaped swimming pool. --Gray.
   [1913 Webster +PJC]