fragile X syndrome

noun

Definition of fragile X syndrome

  1. :  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

1979

First Known Use of fragile x syndrome

1979


Medical Dictionary

fragile X syndrome

play
noun \-ˈeks-\

Medical Definition of fragile X syndrome

  1. :  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


Seen and Heard

What made you want to look up fragile X syndrome? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to link together in a series or chain

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • winning-words-from-the-national-spelling-bee-logo
  • Which is the correct spelling of the winning word from 1988?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!