Noun
a photoelectric cell that uses a strip of selenium
Source: WordNetJoel Stebbins at the University of Illinois Observatory used an early selenium cell photometer to produce the first-ever photoelectric study of a variable star. Source: Internet
In its ultimate electronic form, the photophone receiver used a simple selenium cell at the focus of a parabolic mirror. Source: Internet
Moving images were not possible because, in the scanner: "the sensitivity was not enough and the selenium cell was very laggy". Source: Internet