Happening or occurring during daylight, or primarily active during that time.
Most birds are diurnal.
Said of a flower that is open, or releasing its perfume during daylight hours, but not at night.
Having a daily cycle that is completed every 24 hours, usually referring to tasks, processes, tides, or sunrise to sunset; circadian.
A flower that opens only in the day.
A book containing canonical offices performed during the day, hence not matins.
A diary or journal.
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.
From Latin diurnālis, from diēs (“day”). Doublet of journal.
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