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leguaan

British  
/ ˈlɛɡʊˌɑːn, ˈlɛɡjʊən /

noun

  1. Also called: iguana.  a large amphibious monitor lizard of the genus Varanus, esp V. niloticus (the water leguaan ), which can grow up to 2 or 3 m

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of leguaan

C19: Dutch, from French l'iguane the iguana