Skip to Content

diurnal

Pronunciation: di-ur'nal

Definition:

  1. Pertaining to the daylight hours; opposite of nocturnal.
  2. Repeating once each 24 hours, a diurnal variation or a diurnal rhythm.

[L. diurnus, of the 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.

Hide