Definition of photonuclear in US English:

photonuclear

adjective

Nuclear physics
  • Of or relating to the interaction of a photon with an atomic nucleus.

Origin

1940s; earliest use found in Proceedings of the Royal Society of London. From photo- + nuclear.

Pronunciation

photonuclear

/ˌfəʊtə(ʊ)ˈnjuːklɪə/