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

  • n. Any of a class of generally insoluble proteins, such as collagen, found in skeletal and connective tissue. Also called albuminoid.
  • n. The protein that permeates the chitin of arthropods.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of many fibrous proteins found in connective tissue etc

from The Century Dictionary and Cyclopedia

  • n. A term suggested to designate the albuminoids which occur widely distributed in the skeletal tissues of the animal organism.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a simple protein found in horny and cartilaginous tissues and in the lens of the eye


Sorry, no etymologies found.


  • It is a scleroprotein present largely in cuticular structures such as hair, nails, horn.

    The Treasure-Train


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