scan·di·um (skān'dē-əm) n. Symbol Sc A silvery-white metallic element found in various rare minerals and separated as a byproduct in the processing of certain uranium ores. An artificially produced radioactive isotope is used as a tracer in studies of oil wells and pipelines. Atomic number 21; atomic weight 44.956; melting point 1,540°C; boiling point 2,850°C; specific gravity 2.99; valence 3. See Table at element. [From Latin Scandia, Scandinavia.] scan'dic (-dĭk) adj. |