thyristor
Concise Oxford English Dictionary © 2008 Oxford University Press:
thyristor /θʌɪˈrɪstə/
▶noun Electronics a four-layered semiconductor rectifier in which the flow of current between two electrodes is triggered by a signal at a third electrode.
– origin 1950s: blend of thyratron, denoting a kind of thermionic valve (from Gk thura ‘gate’) and transistor.
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