Etymology
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transistor (n.)

small electronic device, 1948, from transfer + resistor, so called because it transfers an electrical current across a resistor. Said to have been coined by U.S. electrical engineer John Robinson Pierce (1910-2002) of Bell Telephone Laboratories, Murray Hill, N.J., where the device was invented in 1947. It took over many functions of the vacuum tube. Transistor radio is first recorded 1958.

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Definitions of transistor

transistor (n.)
a semiconductor device capable of amplification;
Synonyms: junction transistor / electronic transistor
From wordnet.princeton.edu