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English definition of “transistor”

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transistor

noun [C] uk   /trænˈzɪs.tər/ us    /-ˈzɪs.tɚ/
a small electrical device containing a semiconductor , used in televisions, radios, etc. to control or increase an electric current ( also transistor radio, informal trannie) a small radio containing transistors, used especially in the past
(Definition of transistor from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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