kryp·​ton | \ ˈkrip-ˌtän How to pronounce krypton (audio) \

Definition of krypton

: a colorless relatively inert gaseous element found in air in trace amounts and used especially in electric lamps — see Chemical Elements Table

Examples of krypton in a Sentence

Recent Examples on the Web

Mercury is much heavier than either xenon or krypton, so spacecraft carrying them would be able to generate more thrust. Avery Thompson, Popular Mechanics, "Space Startup Apollo Fusion Wants To Use Mercury as a Fuel—Report," 20 Nov. 2018 But Hahn and Strassmann knew nothing about krypton. Jeremy Bernstein, WSJ, "Review: Enrico Fermi, ‘The Last Man Who Knew Everything’," 15 Dec. 2017 The new model suggests our home planet contains significantly more sodium, potassium, chlorine, zinc, strontium, fluorine, gallium, rubidium, niobium, gadolinium, tantalum, helium, argon, and krypton than previously believed. Jay Bennett, Popular Mechanics, "Scientists Create Most Accurate Estimate of Earth's Composition," 18 Sep. 2017 Alas, the fuddy-duddies of international mineral nomenclature insist that, since the stone doesn’t actually contain the real-world element krypton, it can’t be officially called kryptonite. Brandon Keim, WIRED, "Kryptonite Is Real," 24 Apr. 2007

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'krypton.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of krypton

1898, in the meaning defined above

History and Etymology for krypton

Greek, neuter of kryptos hidden — more at crypt

Keep scrolling for more

Learn More about krypton

Dictionary Entries near krypton






Kryvyy Rih


Statistics for krypton

Look-up Popularity

Time Traveler for krypton

The first known use of krypton was in 1898

See more words from the same year

Keep scrolling for more

More Definitions for krypton



English Language Learners Definition of krypton

: a chemical element that is a colorless gas and that is used especially in electric lights


kryp·​ton | \ ˈkrip-ˌtän How to pronounce krypton (audio) \

Medical Definition of krypton

: a colorless relatively inert gaseous element found in air at about one part per million symbol Kr — see Chemical Elements Table

Keep scrolling for more

More from Merriam-Webster on krypton

Rhyming Dictionary: Words that rhyme with krypton

Spanish Central: Translation of krypton

Nglish: Translation of krypton for Spanish Speakers Encyclopedia article about krypton

Comments on krypton

What made you want to look up krypton? Please tell us where you read or heard it (including the quote, if possible).


one from the Upper Peninsula of Michigan

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Dictionary Devil

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!