lutetium

 
Pronunciation: /luːˈtiːʃɪəm, -sɪəm/
(also lutecium)

noun

[mass noun]
  • the chemical element of atomic number 71, a rare silvery-white metal of the lanthanide series. (Symbol: Lu)

Origin:

early 20th century: from French lutécium, from Latin Lutetia, the ancient name of Paris, the home of its discoverer