sclerotized

/ˈsklɪrəˌtaɪzd/
adjective
  1. Hardened or thickened, especially referring to the outer body parts of insects and other arthropods.
    • Many insects have sclerotized exoskeletons that prevent water loss.
    • The beetle's sclerotized shell protects it from predators.
    • Scientists examined the sclerotized jaws of the ant under a microscope.
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