nonrapid_eye_movement_sleep has definitions from the field of medicine
1
[ noun ] a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time

Related terms

sleep

2
[ noun ] (medicine) a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time

Related terms

sleep

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