Transistor

google

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1940s: from transconductance, on the pattern of words such as varistor .

wiktionary

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Blend of  transfer +‎  resistor. Said to have been  coined by American engineer John Robinson Pierce in 1947. 

etymonline

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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.