deep sleep
noun1
Used other than figuratively or idiomatically: see deep, sleep.
2
Medicine, Sciences stage 3 of non-rapid eye movement sleep
3
Fiction, Literature, Media, Publishing Rare Artificially induced hibernation in humans for the purpose of long distance space travel.
- Donnchadh and Gwalcmai, along with the other fourteen teams selected for planetary infiltration, had been put into deep sleep shortly after liftoff from their planet.2004, Robert Doherty, Area 51: Legend, →ISBN:
- The Kironian had remained in deep sleep until alerted by a high-pitched squeaky sound. When the Kironian woke, everything seemed as though it had just left Kiron.2005, Bob Ticer, Visiting the Strange Planet Called Earth, →ISBN, page 13:
1 more example
- There is also the possibility that our aliens perfected cryogenics and simply went into deep sleep until the environment improved.2008, Cavin Wright, The Golden Prize, →ISBN, page 17: