fragile X syndrome WORD ORIGIN noun a widespread form of mental retardation caused by a faulty gene on the X chromosome. Liberaldictionary.com
Origin of fragile X syndrome First recorded in 1980–85 Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 fragile x syndrome in Medicine fragile X syndrome n. An inherited disorder causing mental retardation, enlarged testes, and facial abnormalities in males and mild mental retardation in females. The American Heritage® Stedman’s Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.