Barr body

noun

: a densely staining inactivated condensed X chromosome that is present in each somatic cell of most female mammals and is used as a test of genetic femaleness (as in a fetus)

called also sex chromatin

Word History

Etymology

Murray Llewellyn Barr †1995 Canadian anatomist

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of Barr body was in 1961

Dictionary Entries Near Barr body

Cite this Entry

“Barr body.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Barr%20body. Accessed 24 Feb. 2024.

Medical Definition

Barr body

noun
: a densely staining inactivated condensed X chromosome that is present in each somatic cell of most female mammals and is used as a test of genetic femaleness (as in a fetus or an athlete)

called also sex chromatin

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