nuclear fusion

Pronunciation

Noun B2 Upper-intermediate

The combining of two light atomic nuclei into a heavier one, releasing enormous energy, the same process that powers the sun.

"Scientists have spent decades trying to make nuclear fusion a practical source of power on earth."

Synonyms and antonyms

nuclear fission

Which word fits the gap? "Scientists have spent decades trying to make _____ a practical source of power on earth."

Answer: nuclear fusion

In your own words, what does "nuclear fusion" mean?

The combining of two light atomic nuclei into a heavier one, releasing enormous energy, the same process that powers the sun.