Phenotypic female lacking one X chromosome, the genotype being designated XO.
Note: This results in a number of developmental abnormalities including short stature,
webbed neck, sexual immaturity, and
sterility.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 816 (https://doi.org/10.1515/pac-2015-1202)