Noun: photometer fow'tó-mi-tu(r)
- Measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
"The scientist used a photometer to measure the brightness of the distant star"
- Photographic equipment that measures the intensity of light
"The photographer used a photometer to determine the correct camera settings";
- light meter, exposure meter
Derived forms: photometers
Type of: measuring device, measuring instrument, measuring system, photographic equipment
Encyclopedia: Photometer