leatherback

noun

1. wide-ranging marine turtle with flexible leathery carapace; largest living turtle

   noun.animal

   Synonyms dermochelys coriacea leatherback turtle leathery turtle

   Source: WordNet 3.0

2. A large sea turtle (<i>Sphargis coriacea</i>), having no bony shell on its back. It is common in the warm and temperate parts of the Atlantic, and sometimes weighs over a thousand pounds; -- called also <i>leather turtle</i>, <i>leathery turtle</i>, <i>leather-backed tortoise</i>, etc.

   noun

   Source: webster1913