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slow-wave sleep

[sloh-weyv] /ˈsloʊˈweɪv/
noun, Physiology.
a recurrent period of deep sleep, typically totaling five or six hours a night, distinguished by the presence of slow brain waves and by very little dreaming.
Also called S sleep.
Compare REM sleep.
Origin of slow-wave sleep
First recorded in 1965-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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