Cryogenic stasis
From Memory Alpha, the free Star Trek reference
Cryogenic stasis, otherwise known as cryostasis or cryogenic suspension, is a form of sleep that appears very much like death.
The USS Enterprise-D encountered a cryonics satellite carrying cyrogenically-frozen Humans from the late 20th century. (TNG: "The Neutral Zone")
John Doe's forearm was kept in cryogenic stasis until it was reattached to his upper arm. (TNG: "Transfigurations")
On Starbase 515, a "cryo unit" was located in surgical suite 5, in room 03-1459. (TNG: "Samaritan Snare")
After beaming the Klingon first officer Hon-Tihl aboard the station, Doctor Julian Bashir suggested to put him into cryostasis because of his severe injuries caused by weapon's fire. Hon-Tihl died on the transporter pad. (DS9: "Dramatis Personae")
While exploring a class L planet emitting an SOS distress signal on an AM radio frequency, the USS Voyager crew encountered eight Humans from the year 1937 who had remained in cryostasis for over 400 years. (VOY: "The 37's")
