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Medical Term:

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]

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