The process whereby one item splits to become two. / (physics) Short for nuclear fission: The process of splitting the nucleus of an atom into smaller particles.

(transitive) To cause to undergo fission. / (intransitive) To undergo fission.

plural of fission

Capable of undergoing nuclear fission; fissile.

Any fissile or fissionable substance.

simple past tense and past participle of fission

The act of splitting into two separate parts

present participle of fission

plural of fissionability

The quality or degree of being fissionable.