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