Illustration of chuckwalla
chuckwalla
noun
chuck·wal·la ˈchək-ˌwä-lə 
variants or chuckawalla
ˈchə-kə-ˌwä-lə
: a large herbivorous lizard (Sauromalus ater) of the iguana family of desert regions of the southwestern U.S.
Word History
Etymology
American Spanish chacahuala, from Cahuilla (Uto-Aztecan language of southeast California) čáxwal
First Known Use
1893, in the meaning defined above