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orthodox sleep

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

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

orthodox sleep in Medicine

orthodox sleep

(ôrthə-dŏks′)
n.
  1. Sleep characterized by a slow alpha rhythm and the absence of REM.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.