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diurnal

Pronunciation: /dʌɪˈəːn(ə)l/
Definition of diurnal

adjective

  • 1of or during the day.
  • Zoology (of animals) active in the daytime.
  • Botany (of flowers) open only during the day.
  • 2daily; of each day:diurnal rhythms
  • Astronomy of or resulting from the daily rotation of the earth:diurnal aberration

Derivatives

diurnally

adverb

Origin:

late Middle English (as a term in astronomy): from late Latin diurnalis, from Latin diurnus 'daily', from dies 'day'

diurnal in other Oxford dictionaries

Definition of diurnal in the US English dictionary

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