Definition of nucleonics in English:

nucleonics

Pronunciation /ˌn(y)o͞oklēˈäniks/ /ˌn(j)ukliˈɑnɪks/

plural noun

treated as singular
  • The branch of science and technology concerned with atomic nuclei and nucleons, especially the exploitation of nuclear power.

    ‘Therefore quantum nucleonics is not an approach suitable for large scale energy storage use.’
    • ‘But nucleonics won't be getting all the money at once.’

Origin

1940s from nuclear, on the pattern of electronics.