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English definition of “transition metal”

transition metal

noun [C] uk   (also transition element) specialized us  
any of a group of metal chemical elements including copper and gold that show more than one valency (= the number of hydrogen atoms that can combine with one of its atoms to form a compound)Chemical elementsMetals and metalworkingChemical elements
(Definition of transition metal from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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