A metallic element, atomic no. 49, atomic wt. 114.82. [indigo, because of its blue line in the spectrum]
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in·di·um 'in-dē-əm n a malleable fusible silvery metallic element that is chiefly trivalent, occurs esp. in sphalerite ores, and is used as a plating for bearings, in alloys having a low melting point, and in making transistors abbr. In see ELEMENT (table)
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in·di·um (In) (inґde-əm) [L. indicum indigo] a metallic element, atomic number 49, atomic weight 114.82; named from its blue line in the spectrum.Medical dictionary. 2011.