from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A short-lived, radioactive synthetic transuranic element produced from californium and whose most stable isotope has a mass number of 262 with a half-life of 3.6 hours; atomic number 103. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A transuranic chemical element (symbol Lr, formerly Lw) with atomic number 103.
from the GNU version of the Collaborative International Dictionary of English
- n. A transuranic element of atomic number 103. It was discovered in 1961 by bombardment of californium in a cyclotron with boron nuclei. Other isotopes were prepared in 1965 at Dubna. The atomic weight of the most stable isotope is 256, having a half-life of 35 seconds. Symbol Lr.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a radioactive transuranic element synthesized from californium
Lawrence Berkeley Laboratory at Berkeley, California; Lawrence Livermore National Laboratory at Livermore, California; and element 103, lawrencium, were all named in his honor.
The Lawrence Berkeley Laboratory has produced a dozen superheavy elements called transuranics and bear such names as berkelium, californium, lawrencium and seaborgium.
The list comes to some 103, ranging from the most abundant and simplest of all, hydrogen, to the transuranic monsters, nobelium and lawrencium.