intercalation

About 0.25 uses per million words.

Meaning

1. noun A period inserted into a calendar as in a leap year.
2. noun The reversible insertion of a molecule between two others.
3. noun A layer introduced into a pre-existing sequence.

Similar words

embolism intercalator intercalary intercalant interlocation intermean interlunation interlapse interleave interlude

Often followed by

of compounds in and compound is into was process