biphasic sleep
The practice of sleeping twice per night, interrupted by a period of wakefulnessThe practice of sleeping twice per night, interrupted by a period of wakefulness; common in the days before electric lighting during the season with longer night.
Meaning
2 senses(uncountable)The practice of sleeping twice per night, interrupted by a period of wakefulness; common in the days before electric lighting during the season with longer night.
(uncountable)The practice of taking a regular nap during the afternoon and sleeping fewer hours at night.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable