REM
noun [ U ] uk/rem/ uk/ˌɑːr.iːˈem/ us/rem/ /ˌɑːr.iːˈem/
快速眼动睡眠(rapid eye movement的缩写)
abbreviation for rapid eye movement: quick movements of the eyes that happen at certain times while you are sleeping and dreaming
REM sleep 快速眼动睡眠