Definition of indium in English:


(also In)

Pronunciation /ˈindēəm/ /ˈɪndiəm/


  • The chemical element of atomic number 49, a soft silvery-white metal occurring naturally in association with zinc and some other metals.

    ‘These elements include mercury, bromine, cadmium, indium, thallium, lead, and bismuth.’
    • ‘Their catalyst is a solid solution of zinc sulfide, copper indium sulfide, and silver indium sulfide.’
    • ‘Lead alloyed with tin, bismuth, cadmium, indium, or other elements, either alone or in combination, forms alloys with particularly low melting points.’
    • ‘Another type of new fluoroanion of aluminum, gallium, and indium have 1-3 perfluorinated fused ring groups and 2-0 perfluorophenyl groups.’
    • ‘The fluoroanions of aluminum, gallium, and indium are novel weakly coordinating anions which are are highly fluorinated.’


Mid 19th century from indigo(because there are two characteristic indigo lines in its spectrum) + -ium.