Used in geology, hydrogeology, soil science, and building science, the porosity of a porous medium (such as rock or sediment) describes the fraction of void space in the material, where the void may contain, for example, air or water. It is defined by the ratio :
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Porosity is the ratio of pore volume to its total volume. Porosity is controlled by: rock type, pore distribution, cementation, diagenetic history and composition.
https://en.wikipedia.org/wiki/Porosity
po·rous. adj. 1. Admitting the passage of gas or liquid through pores or interstices. 2. Easily crossed or penetrated: a porous border. [Middle English, from Old French. , from Medieval Latin. , from Latin. , passage; see pore 2 .]. po′rous·ly adv.
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Porosity is defined as being full of tiny holes that water or air can get through. An example of porosity is the quality of a sponge.
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(countable and uncountable, plural porosities). ( 1 uncountable) The state of being porous. ( 2 countable) A measure of how porous a material is; the ratio of the volume of pores to the total volume. 3  Link/Cite.
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From Wikipedia, the free encyclopedia. Porosity or void fraction is a measure of the void (i.e., empty) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0 and 100%. There are many ways to test porosity in a substance or part, such as industrial CT scanning.
https://en.wikipedia.org/wiki/Porosity
noun. 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.
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-·ties. 1  the quality or state of being porous. 2  the ratio, usually expressed as a percentage, of the volume of a material's pores, as in rock, to its total volume. 3  anything porous. 4  pore.
http://www.yourdictionary.com/porosity
porous. adj. 1. permeable to water, air, or other fluids. 2. (Geological Science) biology geology having pores; poriferous. 3. easy to cross or penetrate: the porous border into Thailand; the most porous defence in the league.
http://www.thefreedictionary.com/porous
Microscopic structure of shale, sandstone, and limestone with water in pore spaces. Note differences in scale among views of each rock type. 4. Describe how the shape and number of pore spaces affect permeability of these three rock types. 5. Explain why the sandstone had the highest flow rate. 6. Shale is composed of individual particles with pore spaces between them, similar to the structure of sandstone.
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what is the definition of porosity in science
The definition of porosity is a measure of the void for example empty spaces in a material and is a fraction of the volume of voids over the total volume between 0 and 1, or as a percentage between 0 and 100 in science.