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NREM sleep

[en-rem]
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noun
  1. slow-wave sleep.
Compare REM sleep.

Origin of NREM sleep

1960–65; n(on-)r(apid) e(ye) m(ovement)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
nrem sleep in Science

NREM sleep

[ĕnrĕm′]
  1. See non-REM sleep.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.