photocathode

English Thesaurus

1. a cathode that emits electrons when illuminated (noun.artifact)

hypernym	:	cathode,
definition	:	a negatively charged electrode that is the source of electrons entering an electrical device (noun.artifact)

part meronym	:	electric eye, magic eye, photocell, photoconductive cell, photoelectric cell,
definition	:	a transducer used to detect and measure light and other radiations (noun.artifact)