photocell (noun)

1. The cinematographer used a photocell to accurately measure the amount of light needed for each scene.

2. During World War II, photocells were utilized by military personnel to detect enemy aircraft and submarines.

3. The installation artist incorporated photocells into their artwork to create an interactive experience with light.

4. In the comic book, the superhero's suit was equipped with photocells that enhanced their ability to perceive and respond to their surroundings.