biphasic sleep

"Biphasic sleep" refers to a sleep pattern where total sleep time is divided into two distinct periods within a 24-hour cycle.

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Definition

(common)A sleep pattern involving two separate sleep periods within a day.

Many people in pre-industrial societies practiced biphasic sleep, waking up for a few hours in the middle of the night.
Biphasic sleep can include a long sleep at night and a shorter nap in the afternoon.

(technical)A sleep schedule where an individual sleeps in two segments, typically a longer period at night and a shorter nap during the day.

Adopting a biphasic sleep pattern can be beneficial for some people, aligning better with their natural circadian rhythms.

Terms that have similar or relatively close meanings to "biphasic sleep":