any of several aquatic salamanders of the North American genus Ambystoma, esp A. mexicanum (Mexican axolotl), in which the larval form (including external gills) is retained throughout life under natural conditions (see neoteny): family Ambystomidae
2.
any of various other North American salamanders in which neoteny occurs or is induced
Word origin
C18: from Nahuatl, from atl water + xolotl servant, doll
axolotl in American English
(ˈæksəˌlɑtəl)
noun
any of various members of a genus (Ambystoma) of dark salamanders of Mexico and the W U.S. that mature sexually and breed while remaining in the gilled larval stage due to a thyroid deficiency
Word origin
Sp < Nahuatl a:šo:loλ < a:λ, water + šo:lo:λ, naked