fisión 190
fission . ( Of the lat. )( fissio, - onis ). 1. f. split, broken. 2. f. Biol. Cell division by strangulation, and separation of portions of protoplasm. fission nuclear. 1. f. Fís. Rupture of the nucleus of an atom, with release of energy, such as it is produced by the bombing of the nucleus with neutrons.