In`ter*pen"e*trate (?), v. t. To penetrate between or within; to penetrate mutually.

It interpenetrates my granite mass.

Shelley.

In`ter*pen"e*trate, v. i. To penetrate each the other; to penetrate between bodies or their parts.

Interpenetrating molding(Arch.), in late Gothic architecture, a decoration by means of moldings which seem to pass through solid uprights, transoms, or other members; often, two sets of architectural members penetrating one another, in appearance, as if both had been plastic when they were put together.