fusion, nuclear

The combining of two small atomic nuclei to form a larger nucleus, sometimes with the release of energy. (Compare nuclear fission.)

Note

The fusion of hydrogen into helium releases huge amounts of energy and is the main energy source of stars, including the sun.

Note

Hydrogen bombs use the energy of fusion.

Note

The use of fusion as a controllable energy source on Earth is still in its experimental stages.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.