cryonics Syllabification: (cry·on·ics)Pronunciation: /krīˈäniks/Definition of cryonics noun [treated as singular] the practice or technique of deep-freezing the bodies of those who have died of an incurable disease, in the hope of a future cure. Derivatives cryonic adjective cryonically adverb Origin: 1960s: contraction of cryogenicscryonics in other Oxford dictionaries Definition of cryonics in the British & World English dictionary