The Collaborative International Dictionary of English v.0.48:

Dorado \Do*ra"do\, n. [Sp. dorado gilt, fr. dorar to gild, fr.
   L. deaurare. See 1st Dory, and cf. Fl Dorado.]
   1. (Astron.) A southern constellation, within which is the
      south pole of the ecliptic; -- called also sometimes
      Xiphias, or the Swordfish.
      [1913 Webster]

   2. (Zool.) A large, oceanic fish of the genus Coryph[ae]na.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Dorado
    n 1: a constellation in the southern hemisphere near Reticulum
         and Pictor; contains most of the Large Magellanic Cloud