orthodox sleep

orthodox sleep

noun Physiology.
dreamless sleep, characterized by a slow alpha rhythm of brain waves and no marked physiological changes.

Origin:
1965–70

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American Heritage
Medical Dictionary

orthodox sleep or·tho·dox sleep (ôr'thə-dŏks')
n.
Sleep characterized by a slow alpha rhythm and the absence of REM.

The American Heritage® Stedman's Medical Dictionary
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