Skip to Content


Pronunciation: in-fra'de-an

Definition: Relating to biologic variations or rhythms occurring in cycles less frequent than every 24 hours.

[infra- + L. dies, day]

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.