interdigitation

The act of inserting between the fingers, or of inserting the fingers of one hand between those of the other; hence, the state of being inextricably interwoven or run into each other, as is the case with the characters of the lowest classes of plants and animals; intermixture.

In anatomy, specifically— Reciprocal digitation; the state or quality of being interdigitated or reciprocally interposed by means of digitate processes.

The set of spaces between digits or finger-like processes.

The state of interdigitating; interdigital space.

An interlinking that resembles the fingers of two hands being locked together.