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See REM sleep.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physiology) physiol sleep that appears to be deep but that is characterized by a brain wave pattern similar to that of wakefulness, rapid eye movements, and heavier breathing
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|Noun||1.||paradoxical sleep - a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep|
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