Noun
A genus of lizards which belong to the family Iguanidae. They take the place in the New World of the chameleons in the Old, and in America are often called chameleons.
Source: Webster's dictionaryFor instance, the lizard genus Anolis has been suggested to be broken down into 8 or so different genera which would bring its ~400 species to smaller, more manageable subsets. Source: Internet