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  • fragile X syndrome
    fragile X syndrome
    noun
    an inherited genetic disorder caused by a faulty gene on the X chromosome and having various possible effects, including developmental delays in infancy and early childhood, learning disabilities, intellectual disability, and a number of social, behavioral, and physical difficulties.
  • 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

fragile X syndrome

American  
[fraj-uhl eks sin-drohm, -druhm, frajahyl] / ˈfrædʒ əl ˈɛks ˌsɪn droʊm, -drəm, ˈfrædʒaɪl /

noun

  1. an inherited genetic disorder caused by a faulty gene on the X chromosome and having various possible effects, including developmental delays in infancy and early childhood, learning disabilities, intellectual disability, and a number of social, behavioral, and physical difficulties.


fragile-X syndrome British  

noun

  1. 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

Etymology

Origin of fragile X syndrome

First recorded in 1980–85

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Their results fundamentally change how scientists understand the developmental origins of fragile X syndrome and suggest a potential treatment for brain cells damaged by the dysfunction.

From Science Daily • Oct. 10, 2023

"Blocking the CB1 receptor can relieve seizures and memory issues in a mouse model of fragile X syndrome, a condition related to autism," Spectrum News explained, citing a 2013 study in Nature Medicine.

From Salon • Apr. 20, 2022

Both studies found several hits in genes regulated by the fragile X mental retardation protein, which is missing in fragile X syndrome, a disorder that can lead to intellectual disability and autism.

From Nature • Apr. 2, 2014

Huber adds that drugs that block a similar receptor, mGluR5, are in clinical trials to treat fragile X syndrome.

From Science Magazine • Sep. 13, 2012

There is rising excitement that drugs might be able to relieve some of the behavioral problems associated with autism and in particular a cause of autism and mental retardation known as fragile X syndrome.

From New York Times • Jun. 19, 2012

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