1. A reptile of the order Chelonia, including turtles, tortoises, and terrapins, characterized by a bony or leathery shell.
Usage: scientific/zoological term

1. Of, relating to, or belonging to the order Chelonia or chelonians.
Usage: scientific/zoological term

Examples

• The museum's exhibit featured fossils of ancient chelonians from the Mesozoic era.
• Sea turtles are marine chelonians found in oceans around the world.
• Chelonian species vary greatly in size, from tiny box turtles to massive leatherbacks.
• The veterinarian specializes in chelonian care and rehabilitation.
• Chelonian shells are made of bone covered by horny plates called scutes.
• Many chelonian species are endangered due to habitat loss and pollution.