Source : Webster's Revised Unabridged Dictionary (1913)

Handsomeness \Hand"some*ness\, n.
   The quality of being handsome.

         Handsomeness is the mere animal excellence, beauty the
         mere imaginative.                        --Hare.

Source : WordNet®

handsomeness
     n : the quality of having regular well-defined features
         (especially of a man) [syn: {good looks}]