- noun one of the transuranic elements
- A synthetic chemical element whose atomic number is 103. It has about 10 known isotopes, all of which are unstable, and is an alpha emitter. The techniques employed to produce this element are utilized to help discover new elements with higher atomic numbers. Its chemical symbol is Lr.
- chemical symbolLr
Information & Library Science
- abbreviation in Internet addresses, the top-level domain for Liberia