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diurnal
[ dahy-ur-nl ]
adjective
- of or relating to a day or each day; daily.
- of or belonging to the daytime ( nocturnal ).
- Botany. showing a periodic alteration of condition with day and night, as certain flowers that open by day and close by night.
- active by day, as certain birds and insects ( nocturnal ).
noun
- Liturgy. a service book containing offices for the daily hours of prayer.
- Archaic. a diary.
- Archaic. a newspaper, especially a daily one.
diurnal
/ dī-ûr′nəl /
- Occurring once in a 24-hour period; daily.
- Having a 24-hour cycle. The movement of stars and other celestial objects across the sky are diurnal.
- Most active during the daytime. Many animals, including the apes, are diurnal.
- Having leaves or flowers that open in daylight and close at night. The morning glory and crocus are diurnal.
- Compare nocturnal
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Derived Forms
- diˈurnally, adverb
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Other Words From
- di·urnal·ly adverb
- di·urnal·ness noun
- transdi·urnal adjective
- undi·urnal adjective
- undi·urnal·ly adverb
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Word History and Origins
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Word History and Origins
Origin of diurnal1
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Example Sentences
I think future studies will reveal many plant species that are thought to be dependent on pollination by diurnal insects are indeed pollinated by nocturnal moths, to some extent.
With the help of a therapist, she developed a more diurnal schedule that allowed her to get work done while maintaining a social life.
The diurnal rotation of the Earth is effected round this axis.
He accomplishes his diurnal revolution in less than ten hours!
A son of the first king suggested the plan of giving the sun diurnal movement and the changing light.
Drymobius margaritiferus margaritiferus is diurnal and terrestrial; it feeds on frogs at the edges of breeding ponds by day.
All of these are diurnal, and all but Laemanctus have been observed sleeping on bushes at night.
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