rem
English Thesaurus
1. (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 (noun.quantity)
| hypernym | : | radioactivity unit, |
| definition | : | a measure of radioactivity (noun.quantity) |
2. a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep (noun.state)
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