Source : Webster's Revised Unabridged Dictionary (1913)

Oxheart \Ox"heart`\, n.
   A large heart-shaped cherry, either black, red, or white.

Source : WordNet®

oxheart
     n 1: any of several cultivated sweet cherries having sweet juicy
          heart-shaped fruits [syn: {heart cherry}, {oxheart
          cherry}]
     2: large heart-shaped sweet cherry with soft flesh [syn: {heart
        cherry}, {oxheart cherry}]