Wiktionary
n. (context scifi English) A form of suspended animation in which the body's functions are not merely slowed down but halted entirely.
Usage examples of "hypersleep".
As birthing gifts went, she supposed Maak's gift of the ever-present, ever-in-her-way Elviiz was preferable to pricking her finger on a spindle when she was sixteen (by then she would be quite mature of course, in Linyaari years) and falling into a deep prolonged sleep, rather like hypersleep, as the princess in the fairy tale had done.
Aeron sent us off in the Sword not three hours after the breaking of the Curtain Wall, and it was not until we came out of hypersleep, and were able to review the various transmissions that had reached us while we slept, that we learned of what has happened in Keltia since we left.