Look up fission in Wiktionary, the free dictionary.
Fission, a splitting of something into two or more parts, may refer to:
- Fission (biology), 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, when the nucleus of an atom splits into smaller parts
- Fission (band), a Swedish death metal band
- Fission (album), by Jens Johansson