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verb (used with object), in·ter·ca·lat·ed, in·ter·ca·lat·ing.
  1. to interpolate; interpose.
  2. to insert (an extra day, month, etc.) in the calendar.
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Origin of intercalate

1605–15; < Latin intercalātus past participle of intercalāre to insert a day or month into the calendar, equivalent to inter- inter- + calā- (stem of calāre to proclaim) + -tus past participle suffix
Related formsin·ter·ca·la·tive, adjectiveun·in·ter·ca·lat·ed, adjective

Synonyms for intercalate

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for intercalated

introduce, stick, enter, implant, include, embed, inject, imbed, import, ship, send, infringe, invade, encroach, meddle, interfere, admit, intrude, set, interlope

Examples from the Web for intercalated

Historical Examples of intercalated

British Dictionary definitions for intercalated


verb (tr)
  1. to insert (one or more days) into the calendar
  2. to interpolate or insert
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Derived Formsintercalation, nounintercalative, adjective

Word Origin for intercalate

C17: from Latin intercalāre to insert, proclaim that a day has been inserted, from inter- + calāre to proclaim
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for intercalated



"to insert a day into the calendar," 1610s, from Latin intercalatus, past participle of intercalare "to proclaim the insertion of an intercalary day," from inter- "between" (see inter-) + calare (see calendar). Related: Intercalated; intercalating.

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Online Etymology Dictionary, © 2010 Douglas Harper

intercalated in Medicine


  1. Inserted between two others; interposed.
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Related formsin•terca•late′ v.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.