What is the meaning of Caiman?

Any of the relatively small crocodilians of the genus Caiman, within the family Alligatoridae.

A crocodilian of the subfamily Caimaninae, which includes the very large black caiman.

A semi-aquatic lizard, of the genus Dracaena, found in South America. To differentiate from caimans, they are referred to as caiman lizards.

caiman

caiman

Source: wiktionary.org