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Produced by, or like, breath; vaporous. Boyle.

A division of Foraminifera, including those in which the shell is not porous.

The state or quality of being imporous; want of porosity; compactness. "The . . . imporosity betwixt the tangible parts." Bacon.

es of a substance; to filter into or through something. The water infiltrates through the porous rock. Addison.

The act or process of infiltrating, as if water into a porous substance, or of a fluid into the cells of an organ or part of the body.

One of the spores produced by an isosporous organism.

Siliceous earth; specifically, porous infusorial earth, used as an absorbent of nitroglycerin in the manufacture of dynamite.

Permitting liquids to pass by percolation; not capable of retaining water; porous; pervious; -- said of gravelly or sandy soils, and the like.

The colorless porous framework, or stroma, of red blood corpuscles from which the zooid, or hemoglobin and other substances of the corpuscles, may be dissolved out.

The macrosporangium or case for the larger kind of spores in heterosporous flowerless plants.

n fluids of differing densities, and as taking place through a membrane or an intervening porous structure. The more rapid flow from the thinner to the thicker fluid was then called endosmose, and the opposite, slower current, exosmose. Both are, however, results of the same force. Osmose may be regarded as a form of m…

An absorption of bone so that the tissue becomes unusually porous.

To pass through fine interstices; to filter; as, water percolates through porous stone.

A division of corals including those that have a porous texture, as Porites and Madrepora; -- opposed to Aporosa.

ng to its composition, to produce a medicinal effect, to bind parts together, etc.; as, a porous plaster; sticking plaster.

specific gravities are over 21. -- Platinum sponge (Chem.), metallic platinum in a gray, porous, spongy form, obtained by reducing the double chloride of platinum and ammonium. It absorbs oxygen, hydrogen, and certain other gases, to a high degree, and is employed as an agent in oxidizing.

n important genus of reef-building corals having small twelve- rayed calicles, and a very porous coral. Some species are branched, others grow in large massive or globular forms.

The quality or state of being porous; -- opposed to density.

Porous; as, pory stone. [R.] Dryden.

A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called…