D defs.my
Entry 1 sense Webster, 1913

Interpenetration

· In·ter·pen·e·tra·tion · IPA
01 n. The act or process of penetrating between or within other substances; mutual penetration; also, the result of a process of interpenetration.
  1. 1.
    The act or process of penetrating between or within other substances; mutual penetration; also, the result of a process of interpenetration.