Definition of scotophor in English:

scotophor

Pronunciation /ˈskəʊtəfɔː/

noun

(also scotophore)
Electronics
  • A substance which darkens when bombarded with electrons; specifically such a substance (especially potassium chloride) used as a coating in cathode ray tubes, providing the reverse of the imaging behaviour of a phosphor coating.

Origin

1940s. From scoto- + -phor.