Definition of phototube in English:

phototube

noun

Electronics
  • A photocell in the form of an electron tube with a photoemissive cathode.

    • ‘Firefly flash and locomotion were observed using IR illumination that did not effect the phototube.’
    • ‘Aliquots of 2 mL of the virus-photoproducts solution were placed in quartz phototubes, capped, and bubbled with oxygen for 5 min before being irradiated.’

Pronunciation:

phototube

/ˈfəʊtəʊtjuːb/