thyristor

noun
thy·ris·tor | \thī-ˈri-stər \

Definition of thyristor 

: any of several semiconductor devices that act as switches, rectifiers, or voltage regulators

First Known Use of thyristor

1958, in the meaning defined above

History and Etymology for thyristor

thyratron + transistor

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The first known use of thyristor was in 1958

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