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diurnal
/daɪˈɜːnəɫ/
noun
A flower that opens only in the day.
A book containing canonical offices performed during the day, hence not matins.
A diary or journal.
adjective
Happening or occurring during daylight, or primarily active during that time.
"Most birds are diurnal."
Said of a flower 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.
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