Wordnet 3.0
NOUN (1)
1. 
 the freezing of a seriously ill or recently deceased person to stop tissues from decomposing; 
 the body is preserved until new medical cures are developed that might bring the person back to life; 
- Example: "cryonics is more science fiction than serious science"
WordNet (r) 3.0 (2006):
cryonics
    n 1: the freezing of a seriously ill or recently deceased person
         to stop tissues from decomposing; the body is preserved
         until new medical cures are developed that might bring the
         person back to life; "cryonics is more science fiction than
         serious science"