Micromort
noun ·Rare ·Advanced level
Definitions
- 1 A unit of risk equivalent to a one-in-a-million probability of death.
"This is described as 10 micromorts per operation, and we can compare this figure with other average risks, such as skydiving (also 10 micromorts), or riding a motorcycle in the UK (yoou^([sic]) have to go around 60 miles to rack up 10 micromorts). The micromort is also roughly the average acute risk we face each day simply by being alive."
Example
More examples"This is described as 10 micromorts per operation, and we can compare this figure with other average risks, such as skydiving (also 10 micromorts), or riding a motorcycle in the UK (yoou^([sic]) have to go around 60 miles to rack up 10 micromorts). The micromort is also roughly the average acute risk we face each day simply by being alive."
Etymology
From micro- (“one millionth”) + mort (“death”).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.