Lrn.
/ˌɛlˈɑː/, U.S. /ˌɛlˈɑr/ Chemistry.
The element lawrencium.
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lawrencium1961
Lw1961
Lr1970
1970 Inorg. & Nucl. Chem. Lett. 6 737 One would..expect the behaviour of Lr(III), the last member of the 5f series, to be similar to Lu(III), the last member of the 4f series.
1988 Inorganica Chimica Acta 146 249/2 We tried to produce Lr with an oxidation state lower than 3+ in aqueous solution.
2004 Jrnl. Molecular Struct.: Theochem 673 205/1 A total of 11-25 electrons were correlated for the neutral atoms Ac to Lr.
This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022).
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n.1970