1. hard external structures that support and protect the bodies of certain animals such as insects, crustaceans, and some other invertebrates
Usage: biology
2. wearable mechanical devices that enhance human strength and mobility
Usage: technology; robotics

Examples

• Beetles have tough exoskeletons that protect their soft internal organs.
• Crabs must shed their exoskeletons periodically as they grow larger.
• The lobster’s exoskeleton turned bright red when it was cooked.
• Scientists are developing exoskeletons to help paralyzed patients walk again.
• Military researchers are testing exoskeletons that allow soldiers to carry heavier loads.
• The factory workers wore exoskeletons to reduce strain on their backs.
• Unlike mammals, insects have exoskeletons instead of internal bones.