intercalation

/ɪnˌtɜːrkəˈleɪʃən/
noun
  1. The insertion of an extra day, month, or period into a calendar to align it with astronomical cycles.
    • Without intercalation, our calendar would slowly drift out of alignment with the seasons.
    • The intercalation of a leap day every four years keeps the calendar synchronized with the Earth's orbit.
    • Ancient calendars sometimes required intercalation of an extra month.
  2. The insertion of something between other things, especially in a sequence or structure.
    • The intercalation of new chapters made the book longer but more comprehensive.
    • The intercalation of commercial breaks disrupted the flow of the movie.
    • In chemistry, intercalation refers to the insertion of molecules between layers of a material.
Antonyms
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