interpenetration

Noun
  1. The action of penetrating between or among (synset 100977744)
    is a type of: incursion, penetration - an attack that penetrates into enemy territory
  2. Mutual penetration;
    Diffusion of each through the other (synset 100052532)
    is a type of: penetration - the act of entering into or through something
    same as: permeation

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