- a synthetic, radioactive, metallic element. Symbol: Lr; atomic number: 103.
Origin of lawrencium
1960–65; Lawrence Radiation Laboratory, Berkeley, California + -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a transuranic element artificially produced from californium. Symbol: Lr; atomic no: 103; half-life of most stable isotope, 256 Lr: 35 seconds; valency: 3
C20: named after Ernest Orlando Lawrence (1901–58), US physicist
Word Origin and History for lawrencium
1961, Modern Latin, from the name of Ernest O. Lawrence (1901-1958), U.S. physicist, cyclotron pioneer and founder of the lab where it was discovered.
Online Etymology Dictionary, © 2010 Douglas Harper
- A radioactive synthetic element produced from californium and having isotopes with mass numbers 253 through 260 and half-lives of 650 milliseconds to 3 minutes; atomic number 103.
- A synthetic, radioactive metallic element of the actinide series that is produced by bombarding californium with boron ions. Its most stable isotope is Lr 262 with a half-life of 3.6 hours. Atomic number 103. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.