The DICT Development Group
3 definitions found
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
From The Elements (07Nov00) :
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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