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porosity

noun

po·​ros·​i·​ty pə-ˈrä-sə-tē How to pronounce porosity (audio)
pȯ-
plural porosities
1
a
: the quality or state of being porous
b
: the ratio of the volume of interstices of a material to the volume of its mass
2
: pore

Examples of porosity in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Used as a warm oil treatment, the blend penetrates more deeply before forming a seal, providing high-porosity hair with both hydration and retention in one step. Jailynn Taylor, Allure, 25 Nov. 2025 Not sure what your porosity level is? Zoë Weiner, Glamour, 14 Nov. 2025 However, that extra porosity reduces how much active material and, in turn, energy the battery can store overall. Prabhat Ranjan Mishra, Interesting Engineering, 30 Oct. 2025 This sponge-like porosity – meaning lots of tiny holes inside – lets MOFs trap and release gases, store energy-rich fuels like hydrogen, and capture harmful pollutants. Bohong Zhang, The Conversation, 10 Oct. 2025 See All Example Sentences for porosity

Word History

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of porosity was in the 14th century

Browse Nearby Words

Cite this Entry

“Porosity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/porosity. Accessed 4 Dec. 2025.

Kids Definition

porosity

noun
po·​ros·​i·​ty pə-ˈräs-ət-ē How to pronounce porosity (audio)
pōr-ˈäs-
pȯ-ˈräs-
plural porosities
: the quality or state of being porous

Medical Definition

porosity

noun
po·​ros·​i·​ty pə-ˈräs-ət-ē, pō-, pȯ- How to pronounce porosity (audio)
plural porosities
1
a
: the quality or state of being porous
b
: the ratio of the volume of interstices of a material to the volume of its mass
2
: pore

More from Merriam-Webster on porosity

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