(n.) A large sea turtle (Sphargis coriacea), 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 leather turtle, leathery turtle, leather-backed tortoise, etc.
LEATHERBACK
Meaning of LEATHERBACK in English
Webster's English dictionary. Английский словарь Webster. 2012