cryostasis

[ krahy-oh-stey-sis, ‐stas-is ]
/ ˌkraɪ oʊˈsteɪ sɪs, ‐ˈstæs ɪs /

noun

the deep-freezing of human bodies or other organisms at death; cryonics.
the state of being in such a deep-freeze: a man held in cryostasis for 50 years.

Origin of cryostasis