phototransistor: Meaning and Definition of

pho•to•tran•sis•tor

Pronunciation: (fō"tō-tran-zis'tur), [key]
— n. Electronics.
  1. a transistor that amplifies current induced by photoconductivity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.