What is another word for external skeleton?
Pronunciation: [ɛkstˈɜːnə͡l skˈɛlɪtən] (IPA) 
The external skeleton, or exoskeleton, is a protective outer casing found in many invertebrate animals like insects, crustaceans, and arachnids. While this term is commonly used, there are many useful synonyms to describe this feature. For example, "cuticle" is often used to describe the exoskeleton of insects specifically. "Carapace" is another term used to describe the exoskeleton of certain crustaceans like crabs and lobsters. "Shell" is commonly used to describe the exoskeleton of mollusks like snails and clams. Finally, "chitinous" is a term used to describe exoskeletons that are made up of a type of organic material called chitin, which is particularly common in arthropods like insects.
