Definition of indium noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɪndiəm//
; NAmE NAmE//ˈɪndiəm//
[uncountable](symbol In)
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a chemical element. Indium is a soft silver-white metal. Word Origin mid 19th cent.: from indigo (because there are two characteristic indigo lines in its spectrum) + -ium.
See the Oxford Advanced American Dictionary entry: indium