/ˈfɪʃ ə nə bəl/
capable of or possessing a nucleus or nuclei capable of undergoing
a fissionable nucleus; fissionable material.
capable of undergoing nuclear fission as a result of any process
Collins English Dictionary - Complete & Unabridged 10th Edition
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Packed inside the zirconium cladding are pellets of uranium oxide or other fissionable materials.
The fissionable material is degrading all the time and after several years they will no longer be sufficient to be fissile.
They create plutonium which is highly fissionable and highly desired by any country trying to develop a nuclear weapon.
Each cell could contain a tiny speck of fissionable material, or the cells could cluster in a colony around a source.
The others are too fissionable or not fissionable enough.
Fissionable nuclear fuel is a non-renewable resource.
In a fission chain reaction, a fissionable nucleus absorbs a neutron and fissions spontaneously, releasing additional neutrons.
Nuclear explosions cannot occur in conventional reactors because the density of fissionable material is too low.
Modeling of the nuclear fuel permits a cross-flow of fissionable material between various reactors in a continuous fashion.
Fissionable as well as non-fissionable media can be treated.