exoskeleton

US /ˌek.soʊˈskel.ət̬ən/
UK /ˌek.soʊˈskel.ət̬ən/
"exoskeleton" picture
1.

a rigid external covering for the body in some invertebrate animals, providing both support and protection.

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Insects have a hard exoskeleton that protects their soft bodies.
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Crabs and lobsters are known for their strong exoskeletons.
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cuticleshellcarapace
2.

a rigid external support or framework, especially one that supports or protects an organism or structure.

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Engineers are developing robotic exoskeletons to assist people with mobility issues.
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The new building features a strong steel exoskeleton for structural integrity.
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frameworkcasingsupport structure