Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

thermonuclear

play
adjective ther·mo·nu·cle·ar \ˌthər-mō-ˈnü-klē-ər, -ˈnyü-, ÷-ˈn(y)ü-kyə-lər\

Simple Definition of thermonuclear

  • : of or relating to the changes in the nucleus of atoms that happen at extremely high temperatures

Full Definition of thermonuclear

  1. 1 :  of, relating to, or employing transformations in the nuclei of atoms of low atomic weight (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. 2 :  of, utilizing, or relating to a thermonuclear bomb <thermonuclear war> <a thermonuclear attack>

Examples of thermonuclear

  1. Hydrogen bombs are thermonuclear weapons.



Origin of thermonuclear

International Scientific Vocabulary


First Known Use: 1938


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).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders pince-nez spindrift duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ