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Synonyms

paradoxical sleep

American  

noun

Physiology.

  1. REM sleep.

paradoxical sleep British  

noun

  1. 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of paradoxical sleep

First recorded in 1960–65

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.