cryonics

noun

cry·​on·​ics krī-ˈä-niks How to pronounce cryonics (audio)
plural in form but usually singular in construction
: the practice of freezing a person who has died of a disease in hopes of restoring life at some future time when a cure for the disease has been developed
cryonic adjective

Word History

Etymology

earlier cryonic (from Greek krýos "icy cold, frost" + -onic—in bionic) + (-ics) — more at cryo-

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of cryonics was in 1966

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Cite this Entry

“Cryonics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cryonics. Accessed 5 Feb. 2026.

Medical Definition

cryonics

noun, plural in form but usually singular in construction
cry·​on·​ics krī-ˈän-iks How to pronounce cryonics (audio)
: the practice of freezing the body of a person who has died from a disease in hopes of restoring life at some future time when a cure for the disease has been developed
cryonic adjective
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