TURTLE

The word turtle is borrowed from the French word tortue or tortre 'turtle, tortoise'.[3]
It is a common name and may be used without knowledge of taxonomic distinctions.
In North America, it may denote the order as a whole.
In Britain, the name is used for sea turtles as opposed to freshwater terrapins and land-dwelling tortoises.
In Australia, which lacks true tortoises (family Testudinidae), non-marine turtles were traditionally called tortoises, but more recently turtle has been used for the entire group.[4]
The name of the order, Testudines (/tɛˈstjuːdɪniːz/ teh-STEW-din-eez), is based on the Latin word* testudo *'tortoise';[5] and was coined by German naturalist August Batsch in 1788.[1]
The order has also been historically known as Chelonii (Latreille 1800) and Chelonia (Ross and Macartney 1802),[2] which are based on the Ancient Greek word χελώνη (*chelone*) 'tortoise'.[6][7]
Testudines is the official order name due to the principle of priority.[2]
The term chelonian is used as a formal name for members of the group.[1][8]