fis·​sion·​able | \ ˈfi-shə-nə-bəl How to pronounce fissionable (audio) , -zhə-; ˈfish-nə-, ˈfizh- \

Definition of fissionable

Other Words from fissionable

fissionability \ ˌfi-​shə-​nə-​ˈbi-​lə-​tē How to pronounce fissionable (audio) , -​zhə-​ ; ˌfish-​nə-​ , ˌfizh-​ \ noun

Examples of fissionable in a Sentence

Recent Examples on the Web Eisenhower proposed that governments make contributions from their stockpiles of uranium and fissionable materials to an international atomic-energy agency. Rebecca Tuhus-dubrow, The New Yorker, 19 Feb. 2021 Other fissionable atoms, Pu-239 for example, produce different suites of fission products. Andrew Karam, Popular Mechanics, 7 Jan. 2016 A criticality accident is an uncontrolled chain reaction involving a fissionable material like plutonium that releases energy and generates a deadly burst of radiation. Patrick Malone And R. Jeffrey Smith, Washington Post, 18 June 2017 After being sent to the weapons laboratory in Los Alamos, New Mexico, Fuchs spent his time devising a method of imploding the fissionable core of the plutonium bomb. Tony Long, WIRED, 18 Oct. 2011

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

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First Known Use of fissionable

1945, in the meaning defined above

History and Etymology for fissionable

fission entry 1 + -able

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Time Traveler for fissionable

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The first known use of fissionable was in 1945

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Dictionary Entries Near fissionable



fission alga

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Cite this Entry

“Fissionable.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2021.

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More Definitions for fissionable


fis·​sion·​able | \ ˈfish-(ə-)nə-bəl How to pronounce fissionable (audio) , ˈfizh- How to pronounce fissionable (audio) \

Medical Definition of fissionable

: capable of undergoing fission and especially atomic fission


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