lawrencium

American

[law-ren-see-uhm] / lɔˈrɛn si əm /

noun

Chemistry.

a synthetic, radioactive, metallic element. Lr; 103.

lawrencium British

/ lɒˈrɛnsɪəm, lɔː- /

noun

a transuranic element artificially produced from californium. Symbol: Lr; atomic no: 103; half-life of most stable isotope, ²⁵⁶ Lr: 35 seconds; valency: 3

"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

lawrencium Scientific

/ lô-rĕn′sē-əm /

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

Etymology

Origin of lawrencium

1960–65; Lawrence Radiation Laboratory, Berkeley, California + -ium

Example Sentences

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lawrencium

This compared, for example, with only eight seconds for lawrencium 257, until now the heaviest of the known atoms.

From Time Magazine Archive

The scientists estimated its half-life as eight seconds, and they named it lawrencium, after Ernest Lawrence, founder of their laboratory.

From Time Magazine Archive

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023