lawrencium

American  

[law-ren-see-uhm] / lɔˈrɛn si əm /

noun

Chemistry.

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

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lawrencium British  

/ lɔː-, lɒˈrɛnsɪəm /

noun

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

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lawrencium Scientific  

/ lô-rĕn′sē-əm /

1. 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.

2. See Periodic Table

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Etymology

Origin of lawrencium

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