Definition of "xeroderma" []

• Excessive or abnormal dryness of the skin, as in ichthyosis. (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.

• "There is a rare disease called xeroderma pigmentosum XP."
• "People with a rare inherited disorder called xeroderma pigmentosum have extreme sensitivity to the sun and must avoid exposure at all times. a chronic form of sun sensitivity, most often seen in elderly men , that shows up as itchy red, inflamed bumps and scaly patches on sun-exposed skin, Dr. Sarnoff and co-authors wrote in The Skin Cancer Foundation Journal in 2008."
• "All of them have the rare disease known as XP -- xeroderma pigmentosum."