- (of a nuclide) capable of undergoing fission induced by low-energy neutrons, as uranium 233 and 235.
Examples from the Web for fissile
North Korea claims to have converted the fissile material into nuclear weapons.
The cliffs of this island are composed of a fissile primitive rock, on which sandstone reposes in regular beds.
The grits are of a fissile character, and are quarried extensively for flag-stone, ashlers, and fire-stone.A Dictionary of Arts, Manufactures and Mines|Andrew Ure
Other loadstones are of a leaden colour, fissile and not-fissile, capable of being split like slates in layers.On the magnet, magnetick bodies also, and on the great magnet the earth|William Gilbert of Colchester
It appears to us from its use to have been either a quartzite or a fissile limestone.De Re Metallica|Georgius Agricola
Mould, the earth of vegetables, is hardened into fissile slate, which being impregnated with bitumen becomes coal.Lives of Eminent Zoologists, from Aristotle to Linnus|William MacGillivray
British Dictionary definitions for fissile
Word Origin for fissile
Word Origin and History for fissile
1660s, from Latin fissilis "that which may be cleft or split," from fissus, past participle of findere (see fissure).