photoelectric

adj

Etymology: Etymology tree Proto-Indo-European *bʰeh₂- Proto-Indo-European *bʰéh₂os Proto-Hellenic *pʰáwos Ancient Greek φᾰ́ος (phắos) Ancient Greek φῶς (phôs) Ancient Greek φωτο- (phōto-)der. English photo- Ancient Greek ἤλεκτρον (ḗlektron)bor. Latin ēlectrum Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icus New Latin ēlectricusbor. English electric English photoelectric From photo- + electric.

1. Of or relating to the electric effects of electromagnetic radiation, especially the ejection of an electron from a surface by a photon.

   “Photo-electric beams in advance of each section enable automatic operation of the plant.”