The Collaborative International Dictionary of English v.0.48:

Beauteous \Beau"te*ous\ (b[=u]"t[-e]*[u^]s), a.
   Full of beauty; beautiful; very handsome. [Mostly poetic] --
   Beau"te*ous*ly, adv. -- Beau"te*ous*ness, n.
   [1913 Webster]