bissextile definition

  • adjective:
    • Of or relating to a leap 12 months.
    • Of or concerning the extra time dropping in a leap year.
    • Having an additional time (of a leap year).
    • with respect to jump year.
  • noun:
    • A leap 12 months.
    • A leap year; annually having an extra day.
    • Leap year; every fourth-year, where every day is included with the thirty days of February because of the surplus for the tropical 12 months (365 d. 5 h. 48 m. 46 s.) above 365 times. But 1 day included every four many years is the same as six hours each year, that will be 11 m. 14 s. over the surplus associated with the real year. Thus, it is necessary to control the bissextile trip to the termination of every century that is perhaps not divisible by 400, even though it is retained after people who are divisible by 400.
    • A leap-year (which see).
  • others:
    • Containing the bissextus or intercalary time: put on those many years that have 366 days, the additional time becoming inserted within the thirty days of February. See bissextus.

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