The Collaborative International Dictionary of English v.0.48:

Scorpiones \Scor`pi*o"nes\, n. pl. [NL.] (Zool.)
   A division of arachnids comprising the scorpions.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scorpio \Scor"pi*o\, n.; pl. Scorpiones. [L.]
   1. (Zool.) A scorpion.
      [1913 Webster]

   2. (Astron.)
      (a) The eighth sign of the zodiac, which the sun enters
          about the twenty-third day of October, marked thus
          [[scorpio]] in almanacs.
      (b) A constellation of the zodiac containing the bright
          star Antares. It is drawn on the celestial globe in
          the figure of a scorpion.
          [1913 Webster]