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Vinony

isotone

noun

  1. nuclides having the same neutron number but different atomic number or mass number
L1559619 on Wikidata ↗

Wiktionary

adj

  1. monotone nondecreasing.

noun

Etymology: Reinterpretation of the p in isotope as standing for proton, leading to a replacement with the letter n for neutron. Coined by German physicist Kurt Guggenheimer in 1934.

  1. Any of a number of nuclides of different elements that have the same number of neutrons.