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3 definitions found
 for indium
From The Collaborative International Dictionary of English v.0.48 :

  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,
     [1913 Webster +PJC]

From WordNet (r) 3.0 (2006) :

      n 1: a rare soft silvery metallic element; occurs in small
           quantities in sphalerite [syn: indium, In, atomic
           number 49]

From The Elements (07Nov00) :

  Symbol: In
  Atomic number: 49
  Atomic weight: 114.82
  Soft silvery element belonging to group 13 of the periodic table. The
  common natural isotope is In-115, which has a half-life of 6*10^4 years.
  Five other radioisotopes exist. Discovered in 1863 by Reich and Richter.

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