Source : Webster's Revised Unabridged Dictionary (1913)

Axolotl \Ax"o*lotl\, n. [The native name.] (Zo["o]l.)
   An amphibian of the salamander tribe found in the elevated
   lakes of Mexico; the siredon.

   Note: When it breeds in captivity the young develop into true
         salamanders of the genus {Amblystoma}. This also occurs
         naturally under favorable conditions, in its native
         localities; although it commonly lives and breeds in a
         larval state, with persistent external gills. See
         {Siredon}.

Source : WordNet®

axolotl
     n : larval salamander of mountain lakes of Mexico that usually
         lives without metamorphosing [syn: {mud puppy}, {Ambystoma
         mexicanum}]