The largest living sea turtle (Dermochelys coriacea), found in tropical waters and having a tough, leathery carapace with seven longitudinal ridges.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "leatherback" in a sentence
"The leatherback is the world's biggest turtle and listed as Critically Endangered, largely because of poaching for eggs and snaring in fishing gear."
"Among the deaths was a young leatherback, which is extremely rare to the area and one of the most endangered of all sea turtles."
"The leatherback is the world's largest species of turtle -- they can live for up to 80 years and reach 2.4 meters in length."