Leatherback

Part of speech: noun

Pronunciation: /ˈlɛ.ðɚ.bæk/

Definitions

1. A sizable species of turtle found in ocean waters that is notable for having a flexible shell and exceptional diving capabilities
2. This marine turtle, distinguished by its soft, leathery skin and impressive weight, primarily consumes jellyfish in its aquatic environment
3. A large aquatic turtle recognized for its soft, flexible carapace and remarkable ability to dive deep in search of prey

Etymology: The leatherback is the largest living sea turtle, and its name describes its shell, which lacks the hard, bony plates found on other turtles. Instead, the carapace is covered by smooth, leathery skin studded with small bony osteoderms embedded beneath it, giving the back a ridged, rubbery texture. The name is a plain compound: "leather" for the tough, flexible hide, and "back" for the upper surface of the animal, so the word simply means a turtle with a leathery back. The same logic appears in the animal's other common name, the "leathery turtle," and the compound follows the usual English pattern of naming creatures by a conspicuous physical feature. Because the word is transparent, there is no older meaning to uncover; its story is essentially the story of the animal's appearance, noticed by English speakers and written into its name.