noun. A lustrous, iron-gray, malleable metallic rare-earth element 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. cross-reference: Periodic Table.

noun. Chemical symbol, Ce; atomic weight, 141.5; specific gravity, 5.5. A metal discovered in 1803 by Klaproth, Hisinger, and Berzelius independently.

noun. A rare metallic element, occurring in the minerals cerite, allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It resembles iron in color and luster, but is soft, and both malleable and ductile. It tarnishes readily in the air.

noun. A metallic chemical element (symbol Ce) with an atomic number of 58.

noun. a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

"That set off a surge in prices for rare-earth minerals such as lanthanum, often used to make catalysts for refineries, and cerium, which is sometimes used in glass."

CAN  allanite  bastnasite  hydroxylbastnasite  jeweler's rouge  

Ceres  ceria  

metal  metallic element  

actinium  alumina  cadmium  carbonyl  diallyl