electroencephalogram
Americannoun
noun
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A graphic record of brain waves representing electrical activity in the brain, used especially in the diagnosis of seizures and other neurological disorders.
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◆ The instrument used to record an electroencephalogram is called an electroencephalograph. It generates a record of the electrical activity of the brain by measuring electric signals using a set of electrodes attached to the scalp that act as transducers. Differences of electric potential between different parts of the brain are measured by a portable set of galvanometers and printed as a wide paper strip with multiple simultaneous waveform tracings that have standard configurations in the normal brain.
Etymology
Origin of electroencephalogram
First recorded in 1930–35; electro- + encephalogram
Vocabulary lists containing electroencephalogram
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
To measure my brain waves, I wore a high-density electroencephalogram headcap with 128 channels.
From The Wall Street Journal • Jun. 27, 2026
This setup allowed them to collect data in a way similar to a tiny electroencephalogram, or EEG, the test doctors use to measure brain activity in patients.
From Science Daily • Dec. 28, 2025
So she took inspiration from researchers who study language processing in humans and got her hands on an electroencephalogram machine.
From Los Angeles Times • Mar. 22, 2024
The researchers used an EEG, or electroencephalogram, a device that records the electrical activity of the brain using small, metal discs called electrodes that are affixed to the scalp.
From Salon • May 3, 2023
His electroencephalogram revealed nine alpha cycles to the second, but too much theta.
From The Dictator by Marlowe, Stephen
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
