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 (pə-rŏs′ĭ-tē, pô-)
n. pl. po·ros·i·ties
1. The state or property of being porous.
2. A structure or part that is porous.
3. The ratio of the volume of all the pores in a material to the volume of the whole.

[Middle English porosite, from Old French, from Medieval Latin porōsitās, from porōsus, porous; see porous.]


n, pl -ties
1. the state or condition of being porous
2. (Geological Science) geology the ratio of the volume of space to the total volume of a rock
[C14: from Medieval Latin porōsitās, from Late Latin porus pore2]


(pɔˈrɒs ɪ ti, poʊ-, pə-)

n., pl. -ties.
1. the state or quality of being porous.
2. (in rock or other natural material) the ratio of aggregated pore space to the volume of the entire mass: used as a measure of the amount of fluid, as oil, that a geologic stratum might hold.
[1350–1400; Middle English porosytee < Medieval Latin porōsitās. See porous, -ity]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.porosity - the property of being porous; being able to absorb fluids
consistency, eubstance, consistence, body - the property of holding together and retaining its shape; "wool has more body than rayon"; "when the dough has enough consistency it is ready to bake"
sponginess - the porosity of a sponge
permeability, permeableness - the property of something that can be pervaded by a liquid (as by osmosis or diffusion)
solidity, solidness - the consistency of a solid


[pɔːˈrɒsɪtɪ] Nporosidad f


n (of rocks, substance)Porosität f; (of skin)Porigkeit f
References in periodicals archive ?
Permeability: is a measure of the ease with which a fluid (water in this case) can move through a porous rock.
The technique pumps air through the outer tube and forces mud and cuttings upward through the inner tube, preventing them from plugging porous rock formations.
The design required the drill to be intersected under the river with 16-inch casing on the exit side, and 30-inch casing on the entry side to assist with drilling through the porous rock that was present throughout the drill path.
Hydraulic fracturing is a well stimulation treatment for impermeable reservoirs that don't readily release their oil and gas riches, as do conventional reservoirs with porous rock that lets hydrocarbons flow through.
Pilot projects in an as-yet undeveloped oilfield could remake Canada's energy map, if producers can successfully wrest a sludgy, tarry substance called bitumen from porous rock in remote northern Alberta.
The state sits on limestone, a porous rock that easily dissolves in water, with a layer of clay on top.
He cited tight gas--stuck in a very tight, impermeable formations--and shale gas--which is trapped in porous rock structures.
For this theory, a porous rock of porosity, [phi] is considered and the pore space is interconnected, representing Biot's medium.
We can inject the CO into the cavity left by using up the coal and we can also inject it into porous rock just above the coal seam.
It would involve capturing carbon dioxide emissions from the proposed 2Co Energy Don Valley Power Project at Stainforth, Doncaster, and transporting them via a buried pipeline to be permanently stored offshore within natural porous rock formations beneath the North Sea seabed.
Natural gas is found in porous rock reservoirs beneath the earth's surface; hydraulic fracturing releases this trapped gas.