- a steel-gray, ductile metallic element of the rare-earth group found only in combination. Symbol: Ce; atomic weight: 140.12; atomic number: 58.
- a malleable ductile steel-grey element of the lanthanide series of metals, used in lighter flints and as a reducing agent in metallurgy. Symbol: Ce; atomic no: 58; atomic wt: 140.115; valency: 3 or 4; relative density: 6.770; melting pt: 798°C; boiling pt: 3443°C
