Rem - Definition
rem
n 1: a recurring sleep state during which dreaming occurs; a
state of rapidly shifting eye movements during sleep [syn:
paradoxical sleep, rapid eye movement sleep, REM
sleep, rapid eye movement, REM]
2: (Roentgen Equivalent Man) the dosage of ionizing radiation
that will cause the same amount of injury to human tissue as
1 roentgen of X-rays