Definition of cerium in English:

cerium

Syllabification: ce·ri·um
Pronunciation: /ˈsi(ə)rēəm
 
/

noun

  • The chemical element of atomic number 58, a silvery white metal. It is the most abundant of the lanthanide elements and is the main component of the alloy misch metal. (Symbol: Ce)
    More example sentences
    • Green light is also emitted from some lanthanide elements: lanthanum, cerium, and terbium.
    • Correlated systems include radioactive metals, such as plutonium, and compounds based on so-called rare earth elements and transition metals, such as cerium, ytterbium and copper.
    • That porous layer, which contains stabilized zirconia and small amounts of the metals ruthenium and cerium, chemically and cleanly converts the fuel to hydrogen.

Origin

early 19th century: named after the asteroid Ceres, discovered shortly before.

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elaborate ornamentation of a vocal melody