• WordNet 3.6
    • n interpenetration mutual penetration; diffusion of each through the other
    • n interpenetration the action of penetrating between or among
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Webster's Revised Unabridged Dictionary
    • n Interpenetration The act or process of penetrating between or within other substances; mutual penetration; also, the result of a process of interpenetration.
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Century Dictionary and Cyclopedia
    • n interpenetration The act of interpenetrating; reciprocal or mutual penetration; the occupation of the same space by the parts of two bodies.
    • n interpenetration In late medieval arch., from the end of the fifteenth century, the system of continuing moldings which meet each other independently past, the intersection, and generally of considering the identity of various architectural members as preserved after one has come to coincide partly with another or to be swallowed up in it, so that, for instance, the angles and edges of a square member which has become united with a member having a curved surface are shown on the curved surface as if projecting through it. Interpenetration is characteristic of the so-called continuous impost. (See impost.) It is inartistic, and contrary to sound architectural principles, as purporting to represent a false method of construction.
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In literature:

Interpenetrating Faceny's world of Nature, therefore, we have Amfuse's world of Love, or Relation.
"A Voyage to Arcturus" by David Lindsay
Is it to be total interpenetration of the two or partial conjunction?
"The Vedanta-Sutras with the Commentary by Sankaracarya"
Christ, the Spirit of Christ, interpenetrating ours, sweetens, purifies, transforms all.
"The Greatest Thing In the World and Other Addresses" by Henry Drummond
Human history reveals itself as a bewildering series of interpenetrations.
"Anthropology" by Robert Marett
There, as here (he feels), there must be interpenetration of spirit by spirit.
"Nature Mysticism" by J. Edward Mercer
But those departments over-lap and interpenetrate each other.
"Platform Monologues" by T. G. Tucker
There will always be a temper impatient of the past, eager for unity, anxious for something big and interpenetrating.
"Modern Religious Cults and Movements" by Gaius Glenn Atkins
Its form is peculiar; on plan, that of two circles interpenetrating.
"Bell's Cathedrals: The Cathedral Church of Norwich" by C. H. B. Quennell
Apart from this incident, "Absalom's Hair" is so interpenetrated with a sense of reality that we seem to live the story rather than read it.
"Essays on Scandinavian Literature" by Hjalmar Hjorth Boyesen
They interpenetrate and a change in one affects all the others.
"A Preface to Politics" by Walter Lippmann

In poetry:

Clear your coil of kinkings
Into perfect plaiting,
Locking loops and linkings
"Cats Cradle Song," by James Clerk Maxwell
Air, soil, water, fire—these are words;
I myself am a word with them—my qualities interpenetrate with
theirs—my name is nothing to them;
Though it were told in the three thousand languages, what would air,
soil, water, fire, know of my name?
"Carol Of Words" by Walt Whitman

In science:

The filling factor (1 − ρ/σ0 ) takes into account the fact that the particles cannot interpenetrate because of their finite size a.
Nonlinear mean field Fokker-Planck equations. Application to the chemotaxis of biological populations
Note that in both cases obstacles do not experience excluded volume interactions with respect to each other and can thus interpenetrate.
Anomalous subdiffusion due to obstacles : A critical survey
On the other hand, an ideal WZ structure consists of two interpenetrating hexagonal closed packed(HCP) sublattices, one of atom A, the other of atom B, displaced from each other by 3 8 c along the c-axis.
Relative stability of zincblende and wurtzite structure in CdX(X = S, Se, Te) series - A NMTO study
A further kind of distortion, that is possible in the hexagonal structure and forbidden in the cubic, is that the two interpenetrating sublattices are slightly displaced from each other so that an atom of one sublattice is no longer at the centroid of the other sublattice.
Relative stability of zincblende and wurtzite structure in CdX(X = S, Se, Te) series - A NMTO study
The former refers to the interpenetrating triangular sublattices A and B, while the latter refers to a pair of inequivalent Dirac cones K and K (cid:48) in the Brillouin zone.
Stabilizing topological phases in graphene via random adsorption