| Lr | lawrencium; Limes reacting dose of diphtheria toxin |
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| Lw | lawrencium |
| lawrencium | <chemical> Lawrencium. A radioactive actinide discovered in 1961. It has the atomic symbol lr, atomic number 103, and atomic weight of 257. There are two isotopes with mass number 257 or 258, and mass number 256. Chemical name: Lawrencium (12 Dec 1998) |
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Synonyms :
| lawrencium |
the chemical element of atomic number 103, atomic weight 257; produced in 1961 by bombardment of californium isotopes of mass 250, 251, and 252.
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| lawrencium | a radioactive transuranic element synthesized from californium |
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