The Collaborative International Dictionary of English v.0.48:

Curio \Cu"ri*o\ (k?"r?-?), n.; pl. Curios (-?z). [Abbreviation
   of curiosity.]
   Any curiosity[3] or article of virtu; any object esteemed for
   its unusual nature.
   [1913 Webster +PJC]

         The busy world, which does not hunt poets as collectors
         hunt for curios.                         --F. Harrison.
   [1913 Webster]