photocathode

from WordNet (r) 3.0 (2006)
photocathode
    n 1: a cathode that emits electrons when illuminated
    
from The Collaborative International Dictionary of English v.0.48
photocathode \pho`to*cath"ode\ (f[=o]`t[-o]*k[a^]th"[=o]d) n.
   A cathode that emits electrons when illuminated.
   [WordNet 1.5]
    

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