leap second

English

Etymology

1971;[1] derived from the terminology for leap day/leap year.

Noun

leap second (plural leap seconds)

  1. A second of time added to the year occasionally to compensate for variation in the rate of Earth's rotation relative to the absolute standards of time.

Translations

References

  1. leap second”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. "First Known Use of leap second 1971, in the meaning defined above"

Further reading

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