diel Syllabification: (di·el)Pronunciation: /ˈdī(ə)l, ˈdē(ə)l/Definition of diel adjective Biology denoting or involving a period of 24 hours:tidal and diel cyclesOrigin: 1930s: from Latin dies 'day' + -(a)l (see -al)diel in other Oxford dictionaries Definition of diel in the British & World English dictionary
