Definition of nucleosynthesis in US English:



  • The cosmic formation of atoms more complex than the hydrogen atom.

    • ‘Physicists call this process nucleosynthesis, and it had to occur before the structures we observed today, such as atoms and molecules, could exist.’
    • ‘Evidence from both the cosmic microwave background and primordial nucleosynthesis gives tight bounds on how much ordinary matter there is.’
    • ‘The one problem with the story of stellar nucleosynthesis as developed in the 1950s was that it could not explain where helium came from.’
    • ‘Before nucleosynthesis begins, protons and neutrons are continually interconverting by means of weak nuclear interactions (the nuclear interactions are described in more detail a bit later on).’
    • ‘They more or less figured out the whole story, including predictions for primordial nucleosynthesis and the cosmic microwave background.’