Skip to Content


Pronunciation: an′ses-tōr

Definition: A person in the direct line of descent from which a subject of interest is derived (parents or grandparents; but no collaterals or descendants).

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.