ein·stei·ni·um ( n-st n - m)n. Symbol Es A synthetic transuranic element first produced by neutron irradiation of uranium in a thermonuclear explosion and now usually produced in the laboratory by irradiating plutonium and other elements. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C. See Table at element. [After Albert Einstein.] |
einsteinium [aɪnˈstaɪnɪəm]
n
(Chemistry / Elements & Compounds) a metallic transuranic element artificially produced from plutonium. Symbol: Es; atomic no.: 99; half-life of most stable isotope, 252Es: 276 days
[New Latin, named after Albert Einstein (1879-1955), German-born US physicist and mathematician]
| einsteinium (n-stn-m) Symbol Es A synthetic, radioactive metallic element of the actinide series that is usually produced by bombarding plutonium or another element with neutrons. It was first isolated in a region near the explosion site of a hydrogen bomb. Its longest-lived isotope is Es 254 with a half-life of 276 days. Atomic number 99; melting point 860°C. See Periodic Table. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  einsteinium - a radioactive transuranic element produced by bombarding plutonium with neutronsmetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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