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The Collaborative International Dictionary
Pervious

Pervious \Per"vi*ous\, a. [L. pervis; per + via a way. See Per-, and Voyage.]

  1. Admitting passage; capable of being penetrated by another body or substance; permeable; as, a pervious soil.

    [Doors] . . . pervious to winds, and open every way.
    --Pope.

  2. Capable of being penetrated, or seen through, by physical or mental vision. [R.]

    God, whose secrets are pervious to no eye.
    --Jer. Taylor.

  3. Capable of penetrating or pervading. [Obs.]
    --Prior.

  4. (Zo["o]l.) Open; -- used synonymously with perforate, as applied to the nostrils or birds.

Douglas Harper's Etymology Dictionary
pervious

"penetrable, accessible, permeable," 1610s, from Latin pervius "that may be passed through" (see impervious).

Wiktionary
pervious

a. 1 Admitting passage; capable of being penetrated by another body or substance; permeable. 2 Accepting of new ideas. 3 Capable of being penetrated, or seen through, by physical or mental vision. 4 (context obsolete English) Capable of penetrating or pervading. 5 (context zoology English) open; perforate, as applied to the nostrils of birds

WordNet
pervious

adj. admitting of passage or entrance; "pervious soil"; "a metal pervious to heat" [ant: impervious]

Usage examples of "pervious".

But the written truth of books, not transient but permanent, plainly offers itself to be observed, and by means of the pervious spherules of the eyes, passing through the vestibule of perception and the courts of imagination, enters the chamber of intellect, taking its place in the couch of memory, where it engenders the eternal truth of the mind.

The world is too huge a client, and too pervious, too spotty, for a girl to defend against a man.

What good is his cast-iron head if the walls to dash it against are made pervious on purpose?

Exposed to heat, however, physical substance loses this feature to the extent that at the border of its ponderability all matter becomes pervious to light.

That it was able to play this double role arose from its being on the one hand pervious to light, while yet possessing a certain substantial density.

Partly for these reasons, and partly because its electric character makes it especially capable of being rendered at will pervious or impervious to the apergic current, I resolved to make the outer and inner walls of an alloy of .

The inner surface of the windows was somewhat colder, showing that the crystal was more pervious to heat than the walls, with their greater thickness, their outer and inner lining of metal, and massive interior of concrete.

Sweat could not evaporate in water, and there might possibly be some penetration of the pure fluid through the pervious membrane of his skin.

The above affords a partial explanation, and seems fairly satisfactory when taken with my previous suggestion, namely, that during fermentation the bean is rendered pervious to water, which, on distributing itself throughout the bean, dissolves the isolated masses of tannin and diffuses it evenly, so that it encounters and becomes mixed with the enzymes.

The space between the rack of poles and the glass roof was of course pervious to the sun rays and often became very warm.

This screen was, like those of Lonabar, decidedly pervious in that it had an open slit.

Even the tightest of traps became pervious when clairvoyance was involved.

Exposed to heat, however, physical substance loses this feature to the extent that at the border of its ponderability all matter becomes pervious to light.