Definitions
1.VerbTo insert an extra leap day into a calendar in order to maintain synchrony with natural phenomena.
2.VerbTo insert an extra month into a calendar for the same purpose, such as for the Hebrew calendar.
3.VerbTo insert a substance between two or more molecules, bases, cells, or tissues.
4.VerbTo insert anything somewhere (especially between other things), such as an affix into a word.
5.NounAn atom or molecule, or a substance, that enters between the layers of the crystal lattice of another substance, especially that of graphite.
6.NounA compound formed by foreign atoms or molecules entering between the layers of a crystal lattice, especially that of graphite.