diurnal

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English[edit]

Etymology[edit]

From Latin diurnālis, from diēs (day). Cognate with journal.

Pronunciation[edit]

Adjective[edit]

diurnal (not comparable)

  1. Happening or occurring during daylight, or primarily active during that time.
    Most birds are diurnal.
    • Shakespeare
      Ere twice the horses of the sun shall bring / Their fiery torcher his diurnal ring.
  2. (botany) Said of a flower open, or releasing its perfume during daylight hours, but not at night.
  3. Having a daily cycle that is completed every 24 hours, usually referring to tasks, processes, tides, or sunrise to sunset.
  4. (uncommon) Done once every day; daily, quotidian.
  5. (archaic) Published daily.

Quotations[edit]

Synonyms[edit]

  • (having a daily cycle): circadian (biology)

Antonyms[edit]

Coordinate terms[edit]

Translations[edit]

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Noun[edit]

diurnal (plural diurnals)

  1. A flower that opens only in the day.
  2. (Catholicism) A book containing canonical offices performed during the day, hence not matins.
  3. (archaic) A diary or journal.
    • 1663, Hudibras, by Samuel Butler, part 1, canto 2
      He was by birth, some authors write, / A Russian, some a Muscovite, / And 'mong the Cossacks had been bred, / Of whom we in diurnals read.
  4. (archaic) A daily news publication.

Translations[edit]