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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).