'Lutecium' definitions:
Definition of 'lutecium'
From: WordNet
noun
A trivalent metallic element of the rare earth group; usually occurs in association with yttrium [syn: lutetium, lutecium, Lu, atomic number 71]
Definition of 'Lutecium'
From: GCIDE
- Lutetium \Lu*te"ti*um\, n. (Chem.) A metallic element separated from ytterbium in 1907, by Urbain in Paris and by von Welsbach in Vienna. It is a member of the Lanthanide rare earth group. Symbol, Lu; atomic number
- 71; atomic weight 174.967 [C=12.011]. Previously spelled Lutecium. [Webster 1913 Suppl. +PJC]