Source : Webster's Revised Unabridged Dictionary (1913)

Ariel \A"ri*el\, n., or Ariel gazelle \A"ri*el ga*zelle"\ [Ar.
   aryil, ayyil, stag.] (Zo["o]l.)
   (a) A variety of the gazelle ({Antilope, or Gazella,
       dorcas}), found in Arabia and adjacent countries.
   (b) A squirrel-like Australian marsupial, a species of
       {Petaurus}.
   (c) A beautiful Brazilian toucan {Ramphastos ariel}).