Meanings
adjective
- Capable of undergoing nuclear fission; fissile.
nounfissionable (plural fissionables)
plural fissionables
- Any fissile or fissionable substance.
If one nation seized the fissionables within its borders, this would “serve as a danger signal” to other nations. The wrongdoer's gain would be short-lived because other nations would take defensive action in kind.
1956, Bulletin of the Atomic Scientists, volume 12, number 4, page 106
Synonyms & antonyms
Opposite
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Translations
German spaltbar
- spaltbarcapable of undergoing nuclear fission; fissile
Romanian fisionabil
- fisionabilcapable of undergoing nuclear fission; fissile
Tagalog sipakin
- sipakincapable of undergoing nuclear fission; fissile
Cite this entry
APA
fissionable. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/fissionable
MLA
“fissionable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fissionable. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “fissionable,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/fissionable.
Source: fissionable on Wiktionary, CC BY-SA 4.0.