[1] : The Collaborative International Dictionary of English v.0.48

indium \in"dium\, 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
see also:
indigo 

[2] : WordNet (r) 2.0

indium
     n : a rare soft silvery metallic element; occurs in small
         quantities in sphalerite syn: in, atomic number 49
see also:
in atomic number 49 

[3] : Elements database 20001107

indium
symbol: in
atomic number: 49
atomic weight: 114.82
soft silvery element belonging to group 13 of the periodic table. the most
common natural isotope is in-115, which has a half-life of 610^4 years.
five other radioisotopes exist. discovered in 1863 by reich and richter.

Indium >> I Words
Indium, definition of term: Indium
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