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fragile X syndrome

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noun

a widespread form of mental retardation caused by a faulty gene on the X chromosome.

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Origin of fragile X syndrome

First recorded in 1980–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for fragile X syndrome

fragile-X syndrome

noun

an inherited condition characterized by mental subnormality: affected individuals have an X-chromosome that is easily damaged under certain conditions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for fragile X syndrome

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.
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