Source : Webster's Revised Unabridged Dictionary (1913)

Beauteous \Beau"te*ous\, a.
   Full of beauty; beautiful; very handsome. [Mostly poetic] --
   {Beau"te*ous*ly}, adv. -- {Beau"te*ous*ness}, n.

Source : WordNet®

beauteousness
     n : the quality of being good looking and attractive [syn: {comeliness},
          {fairness}, {loveliness}]