What is another word for leap second?
Pronunciation: [lˈiːp sˈɛkənd] (IPA) 
A "leap second" is a one-second adjustment made to Coordinated Universal Time (UTC) in order to keep it in sync with the Earth's rotation. However, there are a few other synonyms for this term. One alternative term is "intercalary second," which is a reference to the practice of adding extra days to calendars to align with the solar year. The term "leap smear" is also sometimes used, referring to a technique where instead of adding an extra second at one specific moment in time, the addition is gradually applied over a longer period. Finally, the term "insertion second" or "inserted second" can be used to refer to the moment when the extra second is added to the UTC time standard.
