- rapid eye movement
WordReference Random House Learner's Dictionary of American English © 2026
rem /rɛm/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Medicinethe quantity of radiation whose biological effect is equal to that produced by one roentgen of x-rays.
rem
(rem),USA pronunciation n. Nucleonics.
REM (rem),USA pronunciation n.
- the quantity of ionizing radiation whose biological effect is equal to that produced by one roentgen of x-rays.
- r(oentgen) e(quivalent in) m(an) 1945–50
REM (rem),USA pronunciation n.
- PhysiologySee rapid eye movement.
- 1955–60
Collins Concise English Dictionary © HarperCollins Publishers::
REM abbreviation for
'rem' also found in these entries (note: many are not synonyms or translations):
ad hominem
- ad rem
- Koolhaas
- rapid eye movement
- ad valorem tax
- bireme
- cont. rem.
- dose equivalent
- in personam
- in rem
- in terrorem clause
- millirem
- NREM
- NREM sleep
- paradoxical sleep
- rapid eye movement sleep
- ream
- remanent magnetism
- Rembrandt
- remex
- remiform
- reminiscent
- reminiscential
- remnant
- REM sleep
- rep
- trireme
- sievert
- slow-wave sleep
- snakebite remedy
- supernova remnant