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Use "fissional" in a sentence
"Obviously, the question on everyone's mind, up until now, when there had been only a seismic signature, was whether, in fact, there had been a fissional, fissionable device."
"But as of now, they really have to get out of not one, but two fissional material programs, and convince us, I think, and the world they've done so."
"This whole thing really got started in October when Assistant Secretary Kelly went in to confront the North Koreans with the fact they had a second nuclear program for obtaining fissional material, enriched uranium, and they admitted it."