Dictionary

photomultiplier tube

noun pho·to·mul·ti·pli·er tube \ˌfō-tō-ˈməl-tə-ˌplī(-ə)r-\

Definition of PHOTOMULTIPLIER TUBE

:  a vacuum tube that detects light especially from dim sources through the use of photoemission and successive instances of secondary emission to produce enough electrons to generate a useful current —called also photomultiplier

First Known Use of PHOTOMULTIPLIER TUBE

1941

photomultiplier tube

noun pho·to·mul·ti·pli·er tube \ˌfōt-ō-ˈməl-tə-ˌplī(-ə)r-\   (Medical Dictionary)

Medical Definition of PHOTOMULTIPLIER TUBE

:  a vacuum tube that detects light especially from dim sources through the use of photoemission and successive instances of secondary emission to produce enough electrons to generate a useful current—called also photomultiplier

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