1. The insertion or introduction of something (such as a day, month, or text) into a calendar, document, or sequence.
Usage: Plural form of intercalation.; Commonly used in historical and calendar contexts.
2. In geology and chemistry, the insertion of layers or molecules between existing structures or layers.
Usage: Technical term used in materials science and geology.

Examples

• The intercalations of leap days keep the calendar aligned with Earth's orbit.
• Ancient calendars required careful intercalations to maintain seasonal accuracy.
• The manuscript contained several intercalations made by later scribes.
• Intercalations of new material were discovered between the rock layers.
• The intercalations of graphene sheets created a stronger composite material.
• Historians study intercalations in historical texts to understand editorial changes.