say it: FISH-uh-nuh-buhl
fissionable is an adjective meaning "capable of undergoing nuclear fission". It carries one recorded sense.
capable of undergoing nuclear fission
“a fissionable nucleous”
“fissionable material”
physics
Definitions, synonyms and semantic relations for fissionable come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.