from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. crepuscule; twilight; dusk

from The Century Dictionary and Cyclopedia

  • n. Twilight.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin crepusculum



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  • See also “crepuscle”, “crepuscular”, “crepuscular arch”, “crepuscular ray”, “crepuscule”, “crepusculine”, and “crepusculous”.

    January 26, 2011

  • "In astronomy, twilight; the time from the first dawn, or appearance of the morning to the rising of the sun: and again, between the setting of the sun, and the last remains of day. The crepusculum, or twilight, it is supposed, usually begins and ends when the sun is about 18 degrees below the horizon; for then the stars of the sixth magnitude disappear in the morning, and appear in the evening. It is of longer duration at the solstices than the equinoxes; because the sun, by the obliquity of his path, is longer in ascending through 18 degrees of altitude...."

    Falconer's New Universal Dictionary of the Marine (1816), 111

    October 13, 2008