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The Collaborative International Dictionary
Permeation

Permeation \Per`me*a"tion\, n. The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance.

Here is not a mere involution only, but a spiritual permeation and inexistence.
--Bp. Hall.

Douglas Harper's Etymology Dictionary
permeation

1620s, noun of action from Latin permeare (see permeate).

Wiktionary
permeation

n. 1 The movement of a fluid through a porous or permeable solid. 2 (context medicine English) The spreading of something (especially something malignant) through the body via blood vessels etc.

WordNet
permeation
  1. n. the process of permeating or infusing something with a substance [syn: pervasion, suffusion]

  2. mutual penetration; diffusion of each through the other [syn: interpenetration]

Wikipedia
Permeation

In physics and engineering, permeation (also called imbuing) is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid. It is directly related to the concentration gradient of the permeate, a material's intrinsic permeability, and the materials' mass diffusivity. Permeation is modeled by equations such as Fick's laws of diffusion, and can be measured using tools such as a minipermeameter.

Usage examples of "permeation".

If the soul is body and permeates the entire body-mass, still even in this entire permeation the blending must be in accord with what occurs in all cases of bodily admixing.

Even at far less excessive states of illusory permeation, the immediacy and vividness of the standard virtual adventure was sufficient to make all but the most determinedly and committedly corporeal of humans quite forget that the experience they were having wasn’t authentic, and the very ubiquity of this common place conviction was a ringing tribute to the tenacity, intelligence, imagination and determination of all those individuals and organ isations down the ages who had contributed to the fact that, in the Culture, anybody anytime could experience anything anywhere for nothing, and never need worry themselves with the thought that actually it was all pretend.

Sadie now knew the spell which would retard permeation and blistering on a cuprous oxide mix applied to whitecast iron, and had —.

Sadie now knew the spell which would retard permeation and blistering on a cuprous oxide mix applied to whitecast iron, and had look, see she held out a hand across the foam of her dress, indelible blue half moons of cobalt under her fingernails.