• synonyms


[in-tur-kuh-ley-shuh n]
  1. the act of intercalating; insertion or interpolation, as in a series.
  2. something that is intercalated; interpolation.
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Origin of intercalation

First recorded in 1570–80, intercalation is from the Latin word intercalātiōn- (stem of intercalātiō). See intercalate, -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for intercalation

Historical Examples of intercalation

  • Consequently, the Intercalation and suppression of lunar months.

    Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4


  • They divide the year into twelve months of thirty days, and add five days by intercalation.

  • Intercalation of freshwater beds and of boulder clay and sand at Mundesley.

  • Whenever the intercalation is made there must necessarily be a change in the dominical letter.

    Our Calendar

    George Nichols Packer

  • Had he done so it would now fall on the 24th, by adopting the Gregorian rule of intercalation.

    Our Calendar

    George Nichols Packer

Word Origin and History for intercalation


1570s, from Latin intercalationem (nominative intercalatio) "insertion of an intercalary day," noun of action from past participle stem of intercalare (see intercalate).

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Online Etymology Dictionary, © 2010 Douglas Harper