1. (noun)mud puppy, Necturus maculosus aquatic North American salamander with red feathery external gills Synonyms: hellbender, mud puppy, axolotl
2. (noun)hellbender, mud puppy, Cryptobranchus alleganiensis large salamander of North American rivers and streams Synonyms: hellbender, mud puppy, axolotl
3. (noun)axolotl, mud puppy, Ambystoma mexicanum larval salamander of mountain lakes of Mexico that usually lives without metamorphosing Synonyms: hellbender, mud puppy, axolotl