Radioactive
来自Big Physics
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wiktionary
Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active.
etymonline
radioactive (adj.)
1898, of an atomic nucleus, "capable of spontaneous nuclear decay releasing ionizing emissions," from French radio-actif, coined by Pierre and Marie Curie from radio-, combining form of Latin radius "ray" (see radius) + actif "active" (see active). Of processes, etc., "involving or produced by radioactivity," by 1903.
