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Definition of Earth metal
1. Noun. (chemistry obsolete) Any of the four metals aluminum, gallium, indium and thallium of the boron group in the periodic table of elements. ¹
¹ Source: wiktionary.com
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1. Noun. (chemistry obsolete) Any of the four metals aluminum, gallium, indium and thallium of the boron group in the periodic table of elements. ¹
¹ Source: wiktionary.com