Definition of thermonuclear
1 : of, relating to, or employing transformations in the nuclei of atoms of low atomic weight (such as hydrogen) that require a very high temperature for their inception (as in the hydrogen bomb or in the sun) thermonuclear reaction thermonuclear weapon
2 : of, utilizing, or relating to a thermonuclear bomb thermonuclear war a thermonuclear attack
Examples of thermonuclear in a sentence
Hydrogen bombs are thermonuclear weapons.
Origin and Etymology of thermonuclear
International Scientific Vocabulary
First Known Use: 1938
THERMONUCLEAR Defined for English Language Learners
Definition of thermonuclear for English Language Learners
: of or relating to the changes in the nucleus of atoms that happen at extremely high temperatures
Learn More about thermonuclear
Seen and Heard
What made you want to look up thermonuclear? Please tell us where you read or heard it (including the quote, if possible).