Rem (noun)

1. A unit of measurement for radiation dose equivalent, equal to one roentgen of X-rays.
2. A unit of measurement of sleep cycle duration, used in the study of sleep patterns.

Origin:

Acronym of rapid eye movement, a stage of sleep in which eye movements are rapid.

Examples:

1. The patient received a dose of 50 rems of radiation during the procedure.
2. The scientist recorded several periods of REM sleep in the subject's sleep pattern.
3. The medical device uses a combination of electrical stimulation and REM sleep to help people with sleep problems.
4. The study found that REM sleep deprivation leads to a decrease in cognitive performance.
5. The experiment showed that REM sleep is essential for memory consolidation and learning.