Source : Webster's Revised Unabridged Dictionary (1913)

Gean \Gean\, n. [F. guigne the fruit of the gean; cf. OHG.
   w[=i]hsila, G. weichsel.] (Bot.)
   A species of cherry tree common in Europe ({Prunus avium});
   also, the fruit, which is usually small and dark in color.

Source : WordNet®

Prunus avium
     n : large Eurasian tree producing small dark bitter fruit in the
         wild but edible sweet fruit under cultivation [syn: {sweet
         cherry}]