The story
From information theory + -ic + death, based on clinical death. Coined by American cryptographer and cryonicist Ralph Merkle.
Etymology from Wiktionary, CC BY-SA 4.0.
information-theoretic death
Today it means: The point at which a person's unique memories and individual personality traits are no longer present in a form that could be read or inferred by future technologies; the complete loss of the information that defines an individual. Full definition →