Recent Examples of fission from the Web
But today’s nuclear plants use fission, which splits atoms of rare metals like uranium.
Indeed, fission involves the cleaving of the nucleus into two large fragments.
But these were fission devices, with yields similar to the nuclear weapons that destroyed Hiroshima and Nagasaki, and the bombs that fell off target still inflicted massive damage on urban areas.
The North’s existing weapons, including shorter-range missiles with fission warheads, would imperil the lives of millions of South Koreans and Japanese, as well as around 300,000 Americans who live in those countries.
The larger nut is the fission primary, most likely based on the device tested last year, while the smaller one is an apparently spherical secondary of thermonuclear material.
The swarms of neutrons set free can ramp up the explosive chain reaction of a uranium layer wrapped around it, creating a blast far more devastating than uranium fission alone.
The professional fission supposedly began when Jung’s theory about the psychology of the unconscious and sexuality diverged from Freud’s thinking about psychoanalysis.
Nuclear reactors produce ample amounts of high-energy neutrons as a byproduct of fission reactions.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fission.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
FISSION Defined for English Language Learners
FISSION Defined for Kids
medical Definition of fission
fissionverb fissioned; fissioning \ˈfish-(ə-)niŋ also ˈfizh-\
fissional\ˈfish-ən-ᵊl also ˈfizh-\ adjective
Seen and Heard
What made you want to look up fission? Please tell us where you read or heard it (including the quote, if possible).