leap second 1
noundomain: time
Princeton WordNet [ver.3.1]
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EnglishDefinition
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
Hypernym
second 1
noun
1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
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