To split up.
235U + n --> 236U*
(The * on the Uranium-236 indicates that it is in a highly excited state)
The new nucleus then splits into two daughter nuclei. This split can happen in a number of ways but one example might be:
This process releases roughly 200MeV per event, plus two more neutrons. Unfortunately these neutrons are way too energetic to be captured by other nuclei, so in nuclear reactors or nuclear bombs they are slowed down by a moderator in order to produce a chain reaction
Perhaps these entries should be refactored into nuclear fission and cellular fission? Similarly with fusion, since cells can fuse to form hybridomas, or a virus and a cell undergo membrane fusion, etc.
If you do that, links to this page will probably not work since people rarely use the longer phrase. Personally I like the page as it is.