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Related to sclerotin: sclerotization
An insoluble protein in the cuticle of arthropods that is hardened and darkened by cross-links with quinones and is often bound to chitin filaments.
(Zoology) a protein in the cuticle of insects that becomes hard and dark
scle•ro•tin(ˈsklɪər ə tɪn, ˈsklɛr-)
an insoluble protein that serves to stiffen the chitin of the cuticle of arthropods.