nucleosynthesis


nu·cle·o·syn·the·sis

noun \ˌnü-klē-ō-ˈsin(t)-thə-səs, ˌnyü-\

Definition of NUCLEOSYNTHESIS

:  the production of a chemical element from simpler nuclei (as of hydrogen) especially in a star
nu·cle·o·syn·thet·ic \-sin-ˈthe-tik\ adjective

Origin of NUCLEOSYNTHESIS

New Latin
First Known Use: 1960

nucleosynthesis

noun    (Concise Encyclopedia)

Production on a cosmic scale of all the chemical elements from one or perhaps two simple types of atomic nuclei (see nucleus), those of hydrogen and helium. Elements differ in the number of protons and isotopes of each element by the number of neutrons in their nuclei. One type of nucleus can be transformed into another by adding or removing protons, neutrons, or both, processes that go on in stars. Many of the first 26 elements (up to iron) and their present cosmic abundances can be accounted for by successive nuclear fusion reactions, beginning with hydrogen, in stellar cores. Heavier elements are believed to be created in the death of stars during supernova explosions, by capture of successive neutrons by lighter nuclei and decay of some of these neutrons into protons (with ejection of an electron and a neutrino each time).

Browse

Next Word in the Dictionary: nucleotidase
Previous Word in the Dictionary: nucleosome
All Words Near: nucleosynthesis

Seen & Heard

What made you want to look up nucleosynthesis? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More