Real Dictionary

indium in American English
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
noun: a rare metallic element, soft, white, malleable, and easily fusible, found combined in various ore minerals, esp. sphalerite: so called from the two indigo-blue lines in its spectrum; at. wt.: 114.82; at. no.: 49; sp. gr.: 7.3 at 20°C

indium in British English
noun: a rare soft silvery metallic element associated with zinc ores: used in alloys, electronics, and electroplating. Symbol: In; atomic no: 49; atomic wt: 114.82; valency: 1, 2, or 3; relative density: 7.31; melting pt: 156.63°C; boiling pt: 2073°C