Definition of "scleroprotein" [scleroprotein]

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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