diel: Meaning and Definition of

di•el

Pronunciation: (dī'ul, dē'-), [key]
— adj. Biol.
  1. of or pertaining to a 24-hour period, esp. a regular daily cycle, as of the physiology or behavior of an organism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.