scleroprotein

/ˌsklɪroʊˈproʊtiːn/
noun
  1. A type of protein that is tough, fibrous, and does not dissolve in water, found in skin, bones, and connective tissues.
    • The scientist studied how scleroproteins help form the structure of animal tissues.
    • Collagen is a common scleroprotein that gives strength to your skin and bones.
    • Some animals have scleroproteins in their shells that make them hard and protective.
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