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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 ce·ri·um /ˈsɪriəm/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 ce·ri·um /ˈsɪrɪəm/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Ce·ri·um n.  Chem. 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.

From: WordNet (r) 2.0

      n : a ductile gray metallic element of the lanthanide series;
          used in lighter flints; the most abundant of the
          rare-earth group [syn: Ce, atomic number 58]

From: Elements database 20001107

 Symbol: Ce
 Atomic number: 58
 Atomic weight: 140.12
 Silvery metallic element, belongs to the lanthanoids. Four natural
 isotopes exist, and fifteen radioactive isotopes have been identified.
 Used in some rare-earth alloys. The oxidized form is used in the glass
 industry. Discovered by Martin .H. Klaproth in 1803.