REM sleep /ˈrem sliːp/ BrE AmE noun [uncountable] technical
[ Date: 1900-2000 ; Origin: rapid eye movement ]
(rapid eye movement sleep) a period during sleep when your eyes move quickly, when you are dreaming
REM sleep /ˈrem sliːp/ BrE AmE noun [uncountable] technical
[ Date: 1900-2000 ; Origin: rapid eye movement ]
(rapid eye movement sleep) a period during sleep when your eyes move quickly, when you are dreaming
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012