photocathode
noun
pho·to·cath·ode
| \ ˌfō-tō-ˈka-ˌthōd
\
\
Definition of photocathode
: a cathode that emits electrons when exposed to radiant energy and especially light
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More Definitions for photocathode
photocathode
noun
pho·to·cath·ode
| \ -ˈkath-ˌōd
\
\
Medical Definition of photocathode
: a cathode (as in a photoelectric cell) that emits electrons when exposed to light or other radiation