noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A chemical element (symbol Lu) with an atomic number of 71, a silvery-white metal which resists corrosion in dry air. uncountable
2. 2
   a trivalent metallic element of the rare earth group; usually occurs in association with yttrium wordnet

Synonyms

All synonyms

atomic number 71cassiopeiumcassiopeiumcassiopiumgoldiron

Example

More examples

"Lutetium is a rare earth metal with element symbol Lu and atomic number 71."

Etymology

From Latin Lutetia (“Paris, the capital of France”) + -ium.

Related phrases

lutetium oxideatomic number

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.