Fission, a splitting of something into two or more parts, may refer to: *

Fission (biology) Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the original. The object experiencing fission is usually a cell, but the term may also refer to how ...

, the division of a single entity into two or more parts and the regeneration of those parts into separate entities resembling the original *

Nuclear fission Nuclear fission is a nuclear reaction, reaction in which the atomic nucleus, nucleus of an atom splits into two or more smaller atomic nucleus, nuclei. The fission process often produces gamma ray, gamma photons, and releases a very large ...

, when the nucleus of an atom splits into smaller parts * Fission (band), a Swedish death metal band * ''Fission'' (album), by Jens Johansson

See also