iso·​elec·​tric | \ ˌī-sō-i-ˈlek-trik How to pronounce isoelectric (audio) \

Definition of isoelectric

1 : having or representing zero difference of electric potential
2 : being the pH at which the electrolyte will not migrate in an electric field the isoelectric point of a protein

Examples of isoelectric in a Sentence

Recent Examples on the Web When the brain is starved of blood flow (ischemia) and oxygen (anoxia), the patient faints in a fraction of a minute and his or her electroencephalogram, or EEG, becomes isoelectric—in other words, flat. Christof Koch, Scientific American, "What Near-Death Experiences Reveal about the Brain," 19 May 2020 Only a flat line everywhere—a global isoelectric line—implying a complete absence of any sort of consciousness. Christof Koch, Scientific American, "Is Death Reversible?," 11 Oct. 2019

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

First Known Use of isoelectric

1877, in the meaning defined at sense 1

History and Etymology for isoelectric

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Time Traveler for isoelectric

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The first known use of isoelectric was in 1877

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Cite this Entry

“Isoelectric.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2021.

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More Definitions for isoelectric


iso·​elec·​tric | \ ˌī-sō-i-ˈlek-trik How to pronounce isoelectric (audio) \

Medical Definition of isoelectric

1 : relating to or being a flat line on an electroencephalogram indicating a lack of electrical brain activity : demonstrating an absence of brain waves An isoeletric EEG may be purposely induced by the administration of a barbiturate or propofol to protect the brain during neurosurgery or to stop generalized seizures.— Emery N. Brown et al., The New England Journal of Medicine, 30 Dec. 2010
2 : relating to or being the isoelectric point of a molecule or surface The cytokeratin polypeptides range in apparent molecular weights from 40,000 to 68,000 and isoelectric pH values from 5 to 8 …— Brian Anderton, Nature, 17-23 Mar. 1983

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