nucleocosmochronologyn.
/ˌnjuːklɪəʊˌkɒzməʊkrəˈnɒlədʒi/, U.S. /ˈˌn(j)uklioʊˌkɑzmoʊkrəˈnɑlədʒi/ Astronomy.
Nucleochronology, esp. as used to infer the age of the universe from the ages of the chemical elements.
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nucleocosmochronology1967
nucleochronology1970
1967 W. A. Fowler Nucl. Astrophysics iii. 86 Every scientist likes to invent long words and I use nucleocosmochronology to describe the dating of the nucleosynthesis or the determination of the age of the elements. The dating method was first suggested by the Burbridges and Hoyle and me and uses the uranium-thorium decays just as in geochronology.
1972 W. A. Fowler in F. Reines Cosmol., Fusion & Other Matters vii. 67 (heading) New observations & old nucleocosmochronologies.
1987 Q. Jrnl. Royal Astron. Soc. 28 100 Nucleocosmochronology uses the production and decay of radioactive nuclei as chronometers to determine Δ, the duration of nucleosynthesis in the Galaxy before the formation of the solar system.
2000 Publ. Astron. Soc. Pacific 114 1302 (heading) Nucleocosmochronology with r-process chronometers.
This is a new entry (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1967