/i gwah"neuh/ , n.
1. a large, arboreal lizard, Iguana iguana, native to Central and South America, having stout legs and a crest of spines from neck to tail.
2. any of various related lizards of the genera Iguana, Ctenosaura, Conolophus, and Amblyrhynchus.
[ 1545-55; iwana ]