- capable of or possessing a nucleus or nuclei capable of undergoing fission: a fissionable nucleus; fissionable material.
Origin of fissionable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fissionable
"There are, or were, three chief sources of fissionable ores," Harkaman said.
The fissionable material was too valuable for other purposes.Rip Foster in Ride the Gray Planet
Harold Leland Goodwin
Do you know why that planet was so extensively colonized by the Federation, when there don't seem to be any fissionable ores?
Both uranium 235 and plutonium are fissionable and can be used to produce an atomic explosion.Trinity [Atomic test] Site
White Sands Missile Range Public Affairs Office
What makes the whole thing terrible is that the freighter is loaded with fissionable material exported from Ganymede.Jack of No Trades
- capable of undergoing nuclear fission as a result of any processCompare fissile (def. 1)