leap second

  1. a second (as measured by an atomic clock) added to or subtracted from Greenwich Mean Time in order to compensate for slowing in the Earth's rotation
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How To Use leap second In A Sentence

  • Under an international pact, the preference for leap seconds is December 31 or June 30.
  • It is because of this general slowing down of the Earth that leap seconds need to be inserted into some years.
  • So now we have International Atomic Time (TAI) with no leap seconds, and Coordinated Universal Time (UTC) which have drifted apart by 33 seconds since 1972. A Great Leap…Forward?
  • The last time a leap second was added was in the dying moments of 2005.
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