Indium

In"di*um

(?), n. [NL. See Indigo.] (Chem.) A rare metallic element, of atomic number 49, discovered in certain ores of zinc, by means of its characteristic spectrum of two indigo blue lines; hence, its name. In appearance it resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium (valence +3). Symbol In. Atomic weight, 114.82.
[1913 Webster +PJC]

 

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Sat 15th December 2018