[ pig-muhn-toh-suhm ]
/ ˌpɪg mənˈtoʊ səm /
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a rare inherited disease characterized by sensitivity to ultraviolet light, exposure resulting in lesions and tumors of the skin and eyes.
QUIZ YOURSELF ON PARENTHESES AND BRACKETS APLENTY!
Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?
First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.
First appeared in 1610, based on the French word “baguette” for the long loaf of bread.
First appeared in 1555, and is related to the French word “raquette” for a netted bat.TAKE THE QUIZ TO FIND OUT
Words nearby xeroderma pigmentosum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for xeroderma pigmentosum
Such a skin affection, known as icthyosis, xerosis or xeroderma, is usually due to heredity.Applied Eugenics|Paul Popenoe and Roswell Hill Johnson
Medical definitions for xeroderma pigmentosum
[ pĭg′mən-tō′səm, -mĕn- ]
A rare hereditary skin disorder caused by a defect in the enzymes that repair DNA damaged by ultraviolet light and resulting in hypersensitivity to the carcinogenic effect of ultraviolet light.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.