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 Definitions of leap second  [ˈlipˌfrɒg, -ˌfrɔg]  

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Definition of 'leap second' Random House Webster's College Dictionary 

1. (n.) leap second
an extra second intercalated into the world's timekeeping system about once a year, made necessary by the gradual slowing down of the earth's rotation.

Etymology:  (1970–75)

Definition of 'leap second' Princeton's WordNet 

1. (noun) leap second
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

'leap second' - Nearby Entries  

leap  leap out  leap second  leap year  leaping  lear  learned  



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