external os of uterus

ex·ter·nal os of u·ter·us

[TA]
the vaginal opening of the uterus.
Farlex Partner Medical Dictionary © Farlex 2012

ex·ter·nal os of u·ter·us

(eks-tĕr'năl os yū'tĕr-ŭs) [TA]
The vaginal opening of the uterus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012