a large, venomous lizard, Heloderma suspectum, of the southwestern U.S. and northwestern Mexico, covered with beadlike scales of yellow, orange, and black.
Gi·la monster (hē'lə) n. A venomous lizard (Heloderma suspectum) of arid regions of the southwest United States and western Mexico, having black and orange or yellow scales.
Main Entry: Gi·la monster Pronunciation: 'hE-l&- Function: noun : a large orange and black venomous lizard of the genus Heloderma (H.suspectum) of the southwestern U.S.; also: the beaded lizard (H. horridum) of Mexico