Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An insoluble protein that permeates the chitin in the cuticle of arthropods and becomes hardened and darkened by a natural tanning process.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the crosslinked protein component of the cuticles of insects

Etymologies

sclero- + -tin (as in keratin or chitin).
(American Heritage® Dictionary of the English Language, Fourth Edition)

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