Found 2 items, similar to nonfissionable.
English → English (WordNet) Definition: nonfissionable nonfissionable adj : not capable of undergoing fission [ant: fissionable]
English → English (gcide) Definition: nonfissionable nonfissionable \nonfissionable\ adj. (Physics) not capable of undergoing fission[4]; -- of atoms or chemical elements. Opposite of fissionable. [WordNet 1.5]