1. of, relating to, or composed of chitin (a tough, protective substance found in the exoskeletons of insects and crustaceans)
Usage: technical/scientific

Examples

• The beetle's chitinous shell protected it from predators.
• Insects have a chitinous exoskeleton that provides structural support.
• The crab's chitinous armor was hard and durable.
• Chitin is the main component of the chitinous outer layer of arthropods.
• The chitinous plates of the lobster's body overlapped for flexibility.