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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