a rare metallic chemical element, soft, ductile, and silver-white, occurring in some zinc ores and used in producing bearings and various alloys that melt at relatively low temperatures: symbol, In; at. no., 49
See indium in American Heritage Dictionary 4
(ĭnˈdē-əm)
noun Symbol In
A soft, malleable, silvery-white metallic element found primarily in ores of zinc and tin, used as a plating over silver in making mirrors, in plating aircraft bearings, and in compounds for making transistors. Atomic number 49; atomic weight 114.82; melting point 156.61°C; boiling point 2,080°C; specific gravity 7.31; valence 1, 2, 3. See Table at element.