What is "lutetium oxide"

n. (context inorganic compound English) Any oxide of lutetium, but especially the white solid Lu₂O₃ (lutecia)

Lutetium(III) oxide, a white solid, is a cubic compound of lutetium sometimes used in the preparation of specialty glasses. It is also called lutecia. It is a lanthanide oxide, also known as a rare earth.

This page provides supplementary chemical data on Lutetium(III) oxide