nuclear fusion

noun
fusion ( def 4 ).

Origin:
1895–1900

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World English Dictionary
nuclear fusion
 
n
Compare nuclear fission See also thermonuclear reaction Sometimes shortened to: fusion a reaction in which two nuclei combine to form a nucleus with the release of energy

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Nuclear fusion is always a great word to know.
So is slumgullion. Does it mean:
a scrap or morsel of food left at a meal.
a stew of meat, vegetables, potatoes, etc.
Example sentences
Nuclear fusion is the power source of the future and always will be.
During its brief lifetime, it will produce energy the way the stars and the sun
  do, by nuclear fusion.
After such an explosion blows a star's outer layers into space, the core
  remains-but it no longer produces nuclear fusion.
Most experts agree that the only solution is energy efficiency coupled with
  renewables, unless nuclear fusion proves to be viable.
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