1. inserting something between existing elements or layers
Usage: present participle of intercalate
2. adding an extra day, month, or period to a calendar to keep it aligned with astronomical cycles
Usage: calendar terminology

Examples

• The geologist was intercalating thin clay layers between the rock samples.
• Scientists are intercalating new materials into the crystal structure.
• The ancient Romans were intercalating extra months to correct their calendar.
• She was intercalating additional data points into her research timeline.
• The editor was intercalating footnotes throughout the manuscript.
• They are intercalating leap days to maintain calendar accuracy.