Antonyms for diurnal
daɪˈɜr nldi·ur·nal

WiktionaryRate these synonyms:3.3 / 3 votes

1. diurnaladjective

   Having a daily cycle that is completed every 24 hours, usually referring to tasks, processes, tides, or sunrise to sunset.

   Synonyms:
   circadian

2. diurnaladjective

   Antonyms:
   nightly, nocturnal

English Synonyms and AntonymsRate these synonyms:1.0 / 1 vote

1. diurnal

   Daily is the Saxon and popular, diurnal the Latin and scientific term. In strict usage, daily is the antonym of nightly as diurnal is of nocturnal. Daily is not, however, held strictly to this use; a physician makes daily visits if he calls at some time within each period of twenty-four hours. Diurnal is more exact in all its uses; a diurnal flower opens or blooms only in daylight; a diurnal bird or animal flies or ranges only by day: in contradistinction to nocturnal flowers, birds, etc. A diurnal motion exactly fills an astronomical day or the time of one rotation of a planet on its axis, while a daily motion is much less definite.

   Antonyms:
   nightly, nocturnal

   Synonyms:
   daily

Matched Categories

1. • Biology

Princeton's WordNetRate these antonyms:1.0 / 3 votes

1. diurnaladjective

   of or belonging to or active during the day

   "diurnal animals are active during the day"; "diurnal flowers are open during the day and closed at night"; "diurnal and nocturnal offices"

   Antonyms:
   nocturnal, nonperiodic, aperiodic

2. diurnaladjective

   having a daily cycle or occurring every day

   "diurnal rotation of the heavens"

   Antonyms:
   nonperiodic, aperiodic, nocturnal

How to use diurnal in a sentence?

1. Dr. Urooj Umer:

   The hidden recipe of success is detected by anyone's diurnal plans...

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