Definition

• noun: a reptile that lives mostly in water and that has a hard shell which covers its body
• noun: any of an order (Testudines syn. Chelonia) of terrestrial, freshwater, and marine reptiles that have a toothless horny beak and a shell of bony dermal plates usually covered with horny shields enclosing the trunk and into which the head, limbs, and tail usually may be withdrawn
• synonyms: turtledove, box turtle