Search Result for "photocathode": 
Wordnet 3.0

NOUN (1)

1. a cathode that emits electrons when illuminated; 



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]


WordNet (r) 3.0 (2006):

photocathode
    n 1: a cathode that emits electrons when illuminated