thermonuclear

[ thur-moh-noo-klee-er, -nyoo- or, by metathesis, -kyuh-ler ]
/ ˌθɜr moʊˈnu kli ər, -ˈnyu- or, by metathesis, -kyə lər /

adjective

of, relating to, or involving a thermonuclear reaction: thermonuclear power.

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Origin of thermonuclear

First recorded in 1935–40; thermo- + nuclear

pronunciation note for thermonuclear

See nuclear.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for thermonuclear

British Dictionary definitions for thermonuclear

thermonuclear
/ (ˌθɜːməʊˈnjuːklɪə) /

adjective

involving nuclear fusiona thermonuclear reaction; thermonuclear energy
involving thermonuclear weaponsa thermonuclear war
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for thermonuclear

thermonuclear
[ thûr′mō-nōōklē-ər ]

Relating to the fusion of atomic nuclei at high temperatures or to the energy produced in this way.
Relating to weapons based on nuclear fusion, especially as distinguished from those based on nuclear fission.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for thermonuclear

thermonuclear

A term referring to devices that use nuclear fusion, the fusion of atomic nuclei, to produce energy at very high temperatures. (See hydrogen bomb.)

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.