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rapid eye movement sleep

noun
1.
Origin
1960-1965
1960-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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rapid eye movement sleep in Science
rapid eye movement sleep
  (rāp'ĭd)   
See REM sleep.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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