(Science: zoology) Any species of the genus iguana, a genus of large American lizards of the family Iguanidae. They are arboreal in their habits, usually green in colour, and feed chiefly upon fruits.
The common iguana (i. Tuberculata) of the west indies and south America is sometimes five feet long. Its flesh is highly prized as food. The horned iguana (i. Cornuta) has a conical horn between the eyes.