Cerium oxyde (CeO)2), ifu yumuhondo yoroheje mubushyuhe bwicyumba, ni oxyde ihamye ya cerium yisi idasanzwe. Ikoreshwa cyane nk'inyongeramusaruro mu nganda z'ibirahure, ibikoresho byo gusya, ibyongeweho amarangi, ibikoresho bidasanzwe bya luminescent, nibindi, kandi nkibikoresho fatizo byo guhuza ibyuma bya cerium.
Isosiyete ya WONAIXI imaze imyaka irenga icumi ikora cerium oxyde kandi irashobora guha abakiriya ibicuruzwa byiza bya cerium oxyde nziza nigiciro cyo gupiganwa.