The Collaborative International Dictionary of English v.0.48:

Pandurate \Pan"du*rate\, Panduriform \Pan*du"ri*form\, a. [L.
   pandura a pandore + -form: cf. F. panduriforme.]
   1. Obovate, with a concavity in each side, like the body of a
      violin; fiddle-shaped; as, a panduriform leaf; panduriform
      color markings of an animal.
      [1913 Webster]

   2. (Bot.) Shaped like a fiddle; -- of a leaf.

   Syn: fiddle-shaped.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

panduriform \panduriform\ adj. (Bot.)
   Same as pandurate.

   Syn: pandurate, fiddle-shaped.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

panduriform
    adj 1: (of a leaf shape) having rounded ends and a contracted
           center [syn: pandurate, panduriform, fiddle-shaped]