What does "orthodox sleep" mean?

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

What is a synonym for "orthodox sleep"?

Common synonyms include: nonrapid eye movement, nonrapid eye movement sleep, nrem, nrem sleep.

Rare ·Advanced level

Noun

1
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 wordnet