rapid eye movement

noun

: a rapid conjugate movement of the eyes associated especially with REM sleep

Examples of rapid eye movement in a Sentence

Recent Examples on the Web
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Now new findings specifically show that people who take longer to enter the dream phase of sleep — known as REM (rapid eye movement) — could be experiencing an early symptom of Alzheimer’s disease. Tom Gavin, EverydayHealth.com, 4 Feb. 2025 The device detected when the participants entered rapid eye movement (REM) sleep (so named because the eyes dart from side to side during this phase), when people experience their most vivid dreams. Ingrid Wickelgren, Scientific American, 1 Mar. 2024 Association of rapid eye movement sleep latency with multimodal biomarkers of Alzheimer's disease. Barbara A. Perry, Newsweek, 27 Jan. 2025 Association of rapid eye movement sleep latency with multimodal biomarkers of Alzheimer's disease Before joining Discover Magazine, Paul Smaglik spent over 20 years as a science journalist, specializing in U.S. life science policy and global scientific career issues. Paul Smaglik, Discover Magazine, 27 Jan. 2025 See all Example Sentences for rapid eye movement 

Word History

First Known Use

1900, in the meaning defined above

Time Traveler
The first known use of rapid eye movement was in 1900

Dictionary Entries Near rapid eye movement

Cite this Entry

“Rapid eye movement.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rapid%20eye%20movement. Accessed 21 Feb. 2025.

Kids Definition

rapid eye movement

noun
: rapid movement of the eyes which occurs during the dreaming period of sleep

Medical Definition

rapid eye movement

noun
rap·​id eye movement ˈrap-əd- How to pronounce rapid eye movement (audio)
: a rapid conjugate movement of the eyes associated especially with REM sleep

called also REM

More from Merriam-Webster on rapid eye movement

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