Einsteinium

Part of speech: noun

Definitions

1. A synthetic element with the atomic number 99, named after the physicist Albert Einstein
2. A radioactive metal belonging to the actinide series, used in scientific research and as a source of neutrons
3. An element created through nuclear reactions, distinguished by its heavy isotopes and applications in advanced studies

Etymology: Einsteinium was named in 1955 after Albert Einstein, the physicist whose theories reshaped our understanding of space and time, but he had no hand in its discovery. It was identified that year in the debris of the first thermonuclear weapons test, the 1952 "Ivy Mike" explosion in the Pacific, and the team that found it, led by Albert Ghiorso at the University of California, Berkeley, worked under secret conditions. Einstein himself had died in 1955, just months before the element was announced. The name is built in the most ordinary way: the surname "Einstein" with the suffix "-ium," the standard ending that chemists attached to newly identified elements. Einstein's own name has a lineage of its own, from German "Stein" (stone) with the Old High German "ein," tracing back to the same roots as the English word "one." Chemists followed the convention of honoring scientists, and the element sits near fermium, named after Enrico Fermi, in the periodic table.