Why was "tantrum" trending last week?
photoelectric pho·to·e·lec·tric (fō'tō-ĭ-lěk'trĭk) or pho·to·e·lec·tri·cal (-trĭ-kəl)
Of or relating to the electric effects, especially increased conductivity, caused by light.
Relating to or exhibiting to electrical effects upon exposure to light. For example, some photoelectric materials emit electrons called photoelectrons upon exposure to certain frequencies of light; others, such as photoresistors and phototransistors, change their electrical properties. See also photoelectric effect.