Noun
The process whereby one item splits to become two.
Short for nuclear fission: The process of splitting the nucleus of an atom into smaller particles.
The process by which a bacterium splits to form two daughter cells.
Verb
To cause to undergo fission.
To undergo fission.
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 organisms, bodies, populations, or Species split into discrete parts. The fission may be binary fission, in which a single organism produces two parts, or multiple fission, in which a single entity produces multiple parts.