noun1. either of two large tropical American arboreal herbivorous lizards of the genus Iguana, esp I. iguana (common iguana), having a greyish-green body with a row of spines along the back: family Iguanidae
2. Also called: iguanid (ɪˈɡwɑːnɪd) any other lizard of the tropical American family Iguanidae
3. another name for leguaan
Word origin
C16: from Spanish, from Arawak
iwana