einsteinium

[ ahyn-stahy-nee-uh m ]
/ aɪnˈstaɪ ni əm /

noun Chemistry, Physics.

a transuranic element. Symbol: Es; atomic number: 99.

Origin of einsteinium

1950–55; named after Albert Einstein; see -ium

Words nearby einsteinium

einstein's mass-energy law, einstein's photoelectric equation, einstein's photoelectric law, einstein, albert, einsteinian, einsteinium, einthoven, einthoven's triangle, eir, eire, eirenic

British Dictionary definitions for einsteinium

einsteinium
/ (aɪnˈstaɪnɪəm) /

noun

a metallic transuranic element artificially produced from plutonium. Symbol: Es; atomic no: 99; half-life of most stable isotope, 252 Es: 276 days

Word Origin for einsteinium

C20: New Latin, named after Albert Einstein

Medical definitions for einsteinium

einsteinium
[ īn-stī′nē-əm ]

n. Symbol Es

A radioactive transuranic element synthesized by neutron irradiation of plutonium or other elements. Its longest-lived isotope is Es 254 with a half-life of 275 days. Atomic number 99.

Scientific definitions for einsteinium

einsteinium
[ īn-stī′nē-əm ]

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.