leap second

英 美
  • n.[天]闰秒
  • leap v.跳跃;跃过;跃n.跳跃;跃
  • second adj.第二的;次等的;再一个的num.第二n.片刻;秒adv.第二;其次v.支持;赞成;附和;调派
Noun:
  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