Meaning of ceria

ce•ri•a

Pronunciation: (sēr'ē-u), [key]
— n.
  1. a white-to-yellow, heavy powder, cerium dioxide, CeO, usually derived from cerium nitrate by decomposition with heat: used chiefly in ceramics, glass polishing, and decolorizing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.