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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
The term was coined in 1848 by Rudolf Virchow. From Old French embolisme (“intercalation of days in a calendar to correct errors”), from Late Latin embolismus, from Ancient Greek ἐμβολισμός (embolismós, “intercalary”), from ἐμβάλλω (embállō, “to insert, throw in”).
intercalation
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Classic usage
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