einsteinium

[ ahyn-stahy-nee-uhm ]
/ aɪnˈstaɪ ni əm /

noun Chemistry, Physics.

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

QUIZZES

IS YOUR VOCABULARY AS STRONG AS A HIGH SCHOOL STUDENT? TRY THIS QUIZ TO SEE!

It may seem like fun and games but this quiz that uses vocab from popular stories will determine how much you know.
Question 1 of 10
disgruntle

Origin of einsteinium

1950–55; named after Albert Einstein; see -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for einsteinium

einsteinium
[ īn-stīnē-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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for einsteinium

einsteinium
[ īn-stīnē-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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.