a gray chemical element, the most abundant of the rare-earth elements: it is used in alloys, electronic components, and nuclear fuels: symbol, Ce; at. no. 58
Origin of ceriumModern Latin from Cer(es) + -ium: so named (1804) by its discoverers, J. J. Berzelius and W. Hisinger (1766-1852), Swedish mineralogists, after Ceres, which had recently been discovered
A lustrous, iron-gray, malleable metallic element of the lanthanide series that occurs chiefly in the minerals monazite and bastnaesite, exists in four allotropic states, is a constituent of pyrophoric alloys, and is used in metallurgy and in the manufacture of glass, incandescent mantles, and hydrocarbon combustion catalysts. Atomic number 58; atomic weight 140.12; melting point 799°C; boiling point 3,443°C; specific gravity 6.77; valence 3, 4. See Periodic Table.
Origin of ceriumCer(es) -ium
- A metallic chemical element (symbol Ce) with an atomic number of 58.
OriginSee also: cérium
From Ceres (“a recently discovered asteroid”) + -ium.