The Collaborative International Dictionary of English v.0.48:

Chalybean \Cha*lyb"e*an\, a. [L. chalybe["i]us, fr. chalybs
   steel, Gr. ?.]
   1. Of or pertaining to the Chalybes, an ancient people of
      Pontus in Asia Minor, celebrated for working in iron and
      steel.
      [1913 Webster]

   2. Of superior quality and temper; -- applied to steel.
      [Obs.] --Milton.
      [1913 Webster]