Interpenetration

In`ter`pen`e`tra´tion

n.

1.

The act or process of penetrating between or within other substances; mutual penetration; also, the result of a process of interpenetration.

Thesaurus

Noun	1.	interpenetration - the action of penetrating between or among penetration, incursion - an attack that penetrates into enemy territory
	2.	interpenetration - mutual penetration; diffusion of each through the other permeation penetration - the act of entering into or through something; "the penetration of upper management by women"