Dictionary

fragile X syndrome

noun

Definition of FRAGILE X SYNDROME

:  an X-linked inherited disorder that is characterized especially by moderate to severe mental retardation, by a long face and large ears, and by large testes in males and that often has limited or no effect in heterozygous females —called also fragile X

First Known Use of FRAGILE X SYNDROME

1979

fragile X syndrome

noun \-ˈeks-\   (Medical Dictionary)

Medical Definition of FRAGILE X SYNDROME

:  an X-linked inherited disorder that is caused by repeats of a trinucleotide sequence on the X chromosome which are abnormal in number and degree of methylation, that is characterized by moderate to severe mental retardation, by large ears, chin, and forehead, and by enlarged testes in males, and that often has limited or no effect in heterozygous females—called also fragile X

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