To insert an extra month into a calendar for the same purpose. The Hebrew calendar has such a month.
(molecular biology) To insert a substance between two or more molecules, bases, cells, or tissues.
Origin of intercalate
Latin intercalāreintercalāt-inter-inter-calāreto proclaimkelə-2 in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
Borrowed from Latinintercalātus, perfect passive participle of intercalō.
Intercalate Sentence Examples
It Has Been Stated By Scaliger, Weidler, Montucla, And Others, That The Modern Persians Actually Follow This Method, And Intercalate Eight Days In Thirty Three Years.
The era began on the 11th of July 552, and their year is vague, that is to say, it does not intercalate a day in February every fourth year, like the Julian calendar.
Not Even Appear That The Length Of The Intercalary Month Was Regulated By Any Certain Principle, For A Discretionary Power Was Left With The Pontiffs, To Whom The Care Of The Calendar Was Committed, To Intercalate More Or Fewer Days According As The Year Was Found To Differ More Or Less From The Celestial Motions.