RhymeZone: interdigitate definitions

Definitions of interdigitate:

verb: (transitive) To fold or lock together, as when the fingers of one hand are laced between those of the other.
verb: (intransitive) To become folded or locked together, like the fingers of a folded hand.
verb: (transitive, figuratively) To intermingle; to present alternately items from one group and then another.

(Definitions from Wiktionary)