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.
Recent Examples of thermonuclear from the Web
Hobbie notes that people can be carbon-dated, thanks to radiocarbon isotopes in tooth enamel and other human tissues put together after the thermonuclear tests of the mid-20th century.
The venerable B-52 strategic bomber no longer carries thermonuclear bombs.
The isotope hydrogen-1 (99.985% of hydrogen in nature) is a usable fuel for fusion thermonuclear reactions.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thermonuclear'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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
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