per·​mit·​tiv·​i·​ty | \ ˌpər-ˌmi-ˈti-və-tē How to pronounce permittivity (audio) , -mə- \

Definition of permittivity

: the ability of a material to store electrical potential energy under the influence of an electric field measured by the ratio of the capacitance of a capacitor with the material as dielectric to its capacitance with vacuum as dielectric

called also dielectric constant

Examples of permittivity in a Sentence

Recent Examples on the Web The fine structure constant is a combination of four other fundamental constants: the speed of light, the charge on the electron, Planck’s constant, and the permittivity of free space. Chris Lee, Ars Technica, "Fine structure constant may vary with space, constant in time," 28 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'permittivity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of permittivity

1887, in the meaning defined above

History and Etymology for permittivity

permit entry 1 + -ivity (as in selectivity)

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Time Traveler for permittivity

Time Traveler

The first known use of permittivity was in 1887

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Statistics for permittivity

Cite this Entry

“Permittivity.” Dictionary, Merriam-Webster, Accessed 10 Aug. 2020.

More from Merriam-Webster on permittivity

Rhyming Dictionary: Words that rhyme with permittivity Encyclopedia article about permittivity

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