leap second definition

  • noun:
    • another of the time, as assessed by an atomic clock, included with or omitted from official timekeeping systems annually to compensate for changes in the rotation for the planet.
    • a moment period put into the season sporadically to pay for difference when you look at the rate of world's rotation in accordance with the absolute standards period.
    • a second (as calculated by an atomic time clock) added to or subtracted from Greenwich Mean Time being make up for slowing in the Earth's rotation

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