ˈindēəm noun
( -s )
Etymology: New Latin, from International Scientific Vocabulary ind- (II) + New Latin -ium; from the two indigo-blue lines in its spectrum
: a soft malleable easily fusible silvery white metallic element that is resistant to tarnishing and resembles aluminum and gallium in being chiefly trivalent, that occurs in very small quantities in sphalerite and other ores, and that is used chiefly as a plating for lead-coated silver bearings for airplanes — symbol In ; see element table