slow-wave sleep

slow-wave sleep

[sloh-weyv]
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:
1965–70

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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