iguana

 
Pronunciation: /ɪˈgwɑːnə/

noun

  • a large arboreal tropical American lizard with a spiny crest along the back and greenish coloration.
    • Genus Iguana, family Iguanidae: two species, in particular the common green iguana (I. iguana)
  • any iguanid lizard.

Origin:

mid 16th century: from Spanish, from Arawak iwana