nu·​cle·​o·​syn·​the·​sis ˌnü-klē-ō-ˈsin(t)-thə-səs How to pronounce nucleosynthesis (audio)
: the production of a chemical element from simpler nuclei (as of hydrogen) especially in a star
nucleosynthetic adjective

Examples of nucleosynthesis in a Sentence

Recent Examples on the Web Our earth contains a plethora of iron and rare earth metals that were created through stellar nucleosynthesis during billions of years of supernovae enrichment. Bruce Dorminey, Forbes, 21 Feb. 2024 Those reactions then produce new atomic nuclei, a process known as nucleosynthesis. Joshua Rapp Learn, Discover Magazine, 10 Jan. 2024 Helium Helium’s origins go back to just a few minutes after the big bang, when hydrogen, helium and a bit of lithium were produced during what is called big bang nucleosynthesis. Sanjana Curtis, Scientific American, 4 July 2023 Driven by nucleosynthesis in stars, the three most abundant elements in the Universe after hydrogen and helium are oxygen, carbon, and nitrogen, Walker writes. Bruce Dorminey, Forbes, 27 Sep. 2021 Deuterium’s creation was the first step in Big Bang nucleosynthesis, a sequence of nuclear reactions that occurred when the cosmos was a super hot but rapidly cooling soup of protons and neutrons. Quanta Magazine, 11 Nov. 2020 Since then, observations of the cosmic microwave background have become increasingly precise, putting pressure on physicists who study Big Bang nucleosynthesis to match that precision — and so allow a comparison of the two epochs. Quanta Magazine, 11 Nov. 2020 Big Bang nucleosynthesis also enabled physicists to predict the number of different types of neutrinos, which helped drive cosmic expansion. Quanta Magazine, 11 Nov. 2020 In it, the authors argued that nearly all of the chemical elements, from aluminum to zinc, are forged in the bodies of stars, a process now called stellar nucleosynthesis. Margalit Fox,, 8 Apr. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nucleosynthesis.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


New Latin

First Known Use

1957, in the meaning defined above

Time Traveler
The first known use of nucleosynthesis was in 1957

Dictionary Entries Near nucleosynthesis

Cite this Entry

“Nucleosynthesis.” Dictionary, Merriam-Webster, Accessed 20 Apr. 2024.

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