1. a rare metallic chemical element with the symbol Lu and atomic number 71, belonging to the lanthanide series
Usage: chemistry

Examples

• Lutetium is the last element in the lanthanide series of the periodic table.
• Scientists discovered lutetium in 1907 through the analysis of rare earth minerals.
• Due to its scarcity, lutetium is one of the most expensive elements on Earth.
• The radioactive isotope lutetium-177 is used in certain cancer treatments.
• Lutetium has very few commercial applications because of its extreme rarity.
• Research laboratories use lutetium compounds in specialized scientific experiments.