Intercalation

Intercalation may refer to:

• Intercalation (timekeeping), The insertion of a leap day, week or month into some calendar years to make the calendar follow the seasons
• Intercalation (chemistry), the insertion of a molecule (or group) between two other molecules (or groups)
• Intercalation (literature), a technique used to insert one narrative inside another, implying simultaneity
• Intercalation (university administration), the period when a student is officially suspended from studying for an academic degree

• In biology:
  • Intercalation (chemistry), process discovered by Leonard Lerman by which certain drugs and mutagens insert themselves between base pairs of DNA
  • Intercalated duct of exocrine glands
  • Intercalated disc of cardiac muscle
  • Intercalated cells of the collecting duct
  • Intercalated cells of the amygdala