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[foh-tuh-toob, -tyoob] /ˈfoʊ təˌtub, -ˌtyub/
noun, Electronics.
an electron tube with a photosensitive cathode, used like a photocell.
Also called photoelectric tube.
Origin of phototube
1925-30; photo- + tube Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for phototube
  • After the scintillator is done being polished, it is ready to be glued to the phototube.
  • phototube measures beam induced light emission with sub ns resolution.
  • Also, to study luminescence the phototube is replaced with a scanning spectrophotometer.
  • The baseline phototube design has a large gain so that signal to common mode noise should be large.
  • Reduction in phototube output was an indication of the presence of the smoke plume at the level of the light beam.
  • The multiplier phototube is widely used as the radiation detector.
British Dictionary definitions for phototube


a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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