iguana

What it means

1. A green iguana (Iguana iguana), a large tropical American lizard often kept as a pet.

   The problem with keeping the green iguana as a pet is that they are often misfed. For example, some will feed them meat or meat-based foods […]

   2015, Rachel Smith, John Davidson, Lizards For Kids, page 18

2. biologyAny member of the genus Iguana.
3. colloquialIn America and the Pacific, any of several members of the lizard family Iguanidae.

   Marine iguanas line the shores of the islands, and are usually seen sprawled over lava rocks near the sea.

   1991, Martha Holmes, Sea Trek, BBC Books, page 44

In a sentence

The problem with keeping the green iguana as a pet is that they are often misfed. For example, some will feed them meat or meat-based foods […]

2015, Rachel Smith, John Davidson, Lizards For Kids, page 18

Where it comes from

1. Taíno*iwana
2. Spanishiguana
3. Englishiguana

Borrowed from Spanish iguana, from Taíno *iwana.