Pronunciation: (tran-zis'tur), [key]
1. Electronics.a semiconductor device that amplifies, oscillates, or switches the flow of current between two terminals by varying the current or voltage between one of the terminals and a third: although much smaller in size than a vacuum tube, it performs similar functions without requiring current to heat a cathode.
2. Informal.a transistorized radio.
Informal.transistorized: a transistor radio.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.