Also found in: Thesaurus, Encyclopedia, Wikipedia.


 (no͞o′klē-ō-sĭn′thĭ-sĭs, nyo͞o′-)
The process by which heavier chemical elements are synthesized from lighter atomic nuclei in the interiors of stars, during supernova explosions, and in the early stages of the universe.

nu′cle·o·syn·thet′ic (-sĭn-thĕt′ĭk) adj.


(Astronomy) astronomy the formation of heavier elements from lighter elements by nuclear fusion in stars


(ˌnu kli oʊˈsɪn θə sɪs, ˌnyu-)

the formation of new atomic nuclei by nuclear reactions, as in stellar evolution.
nu`cle•o•syn•thet′ic (-ˈθɛt ɪk) adj.


The synthesis of heavier chemical elements from hydrogen nuclei in the interior of a star.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nucleosynthesis - (astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom
astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
synthesis - the process of producing a chemical compound (usually by the union of simpler chemical compounds)
References in periodicals archive ?
High-resolution simulations of these ejecta are critical to uncover the detailed conditions for nucleosynthesis, Specifically, For the rapid-neutron capture process (r-process).
TEHRAN (FNA)- Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis.
Whitman lived in a time before anyone knew anything about nucleosynthesis.
Mixing may be of significance for nucleosynthesis in astronomical object.
During Nucleosynthesis, occurring from the first 3 to 20 minutes, the universe cools down to around a billion degrees, which is cool enough to allow protons and neutrons to combine and produce the first nucleons of helium and hydrogen.
details of nucleosynthesis in the progenitor stars of PN, the
With a preschool teacher's patience, she explains the day and night routines of astronomers, how they collect data on celestial objects, details of nucleosynthesis processes, and all manner of things that can go wrong in the world's largest observatories.
The theory that describes this primordial element production, called Big Bang nucleosynthesis, successfully predicts the abundances of deuterium and helium that astronomers observe in ancient stars.
Interaction of radiation and nuclear particles with other matter by absorption or reaction is covered, along with implications for detection and measurement, followed by stellar nucleosynthesis and occurrence of radioactive elements.
One of the most important problems in physics and astronomy was the inconsistency between the lithium isotopes previously observed in the oldest stars in our galaxy, which suggested levels about two hundred times more Li-6 and about three to five time less Li-7 than Big Bang nucleosynthesis predicts.
It has a reasonably well understood origin, its own current operating principles, and the entities that comprise it (as in the heavier elements, precipitated through nucleosynthesis in stars) are entirely emergent.
Title: Evolution, Nucleosynthesis and Mass Loss in Low and Intermediate-Mass Stars