diurnal


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Related to diurnal: diurnal tide, diurnal enuresis

diurnal

1. (of flowers) open during the day and closed at night
2. (of animals) active during the day
3. a service book containing all the canonical hours except matins

diurnal

(dÿ-er -năl) Happening during a 24-hour day; daily.

Diurnal

(religion, spiritualism, and occult)

Diurnal means “of or belonging to the day.” In classical astrology, particular planets were classified as diurnal and others as nocturnal, no matter where they were in a horoscope. In contemporary astrology, planets are diurnal if they are located above the horizon (i.e., in houses seven through 12). Often astrologers will say that planets above the horizon line show their influence more in the public sphere, whereas planets below the horizon are more private, but this distinction clearly breaks down when considering planets in such locations as the twelfth house (a largely private house situated above the horizon). The term “diurnal arc” refers to the distance, expressed in degrees and minutes of a circle, that a planet traverses between its rising in the east and its setting in the west. Classical astrology also classified signs as diurnal (the masculine signs) and nocturnal (the feminine signs).

Sources:

Bach, Eleanor. Astrology from A to Z: An Illustrated Source Book. New York: Philosophical Library, 1990.
Brau, Jean-Louis, Helen Weaver, and Allan Edmands. Larousse Encyclopedia of Astrology. New York: New American Library, 1980.

diurnal

[dī′ərn·əl]
(biology)
Active during daylight hours.
(science and technology)
Occuring during the daytime.
References in periodicals archive ?
We look forward to developing our already successful relationship with Emerge Health as we continue to build our marketing and distribution capabilities in high value markets outside our core territories," said Diurnal Chief Executive Martin Whitaker.
Children who did well on these tasks also tended to have more typical patterns of diurnal cortisol.
Diurnal raptors, which have eyes arranged laterally, have a central fovea and a temporal fovea (Inzunza et al., 1991; Jones et al.).
The research appeared in the journal Hippocampus, in (http://onlinelibrary.wiley.com/doi/10.1002/hipo.22822/full) a paper titled "Light modulates hippocampal function and spatial learning in a diurnal rodent species: A study using male nile grass rat (Arvicanthis niloticus)."
The mean hemoglobin [A.sub.lc] was higher in the nurses with prior and active night shift work, at 5.3% each, than in the diurnal workers (5.1%, P less than .001).
The diurnal tanks were provided with mechanical aeration daily from 1000 up to 1800 (8 hours of aeration daily).
"We were very surprised to find such close correlation between the disappearance of dinosaurs and the beginning of diurnal activity in mammals, but we unanimously found the same result using several alternative analyses," explained Maor, who is also at UCL.
The behavior of spiders can be influenced by environmental variables, such as temperature, light intensity and moisture/rainfall (e.g., Barth et al., 1988; Wise, 1993; Zaller et al., 2014; Chai & Wilgers, 2015), however, we have found no study on the effect of diurnal rainfall on the nocturnal activity of spiders.
Diurnal temperature range (DIF) can be described as the difference between day and night temperatures (DT and NT) (Erwin et al., 1989).
Diurnal submitted a Pediatric Use Marketing Authorization (PUMA) application for Infacort to the European Medicines Agency (EMA) in late 2016.