This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The preservation of living organisms by employing low temperatures.

"Had you asked him then, he’d certianly have wanted his body treated well while he was out, and you yourself would want the same if you thought you were going to be (temporarily) comatose or in cryostasis."

cryonics   

cryostats