[Barr body] n [Murray Llewellyn Barr b1908 Canad. anatomist] (1963): material of the inactivated X chromosome present in each of the female's somatic cells of most mammals used as a test of genetic femaleness (as in a fetus or an athlete)--called also sex chromatin
BARR BODY
Meaning of BARR BODY in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012