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noun
a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
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noun
(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
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noun
a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
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noun
(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