the sensitivity of a material to light; specifically a numerical value indicating the speed at which a photographic film or sensor reacts to light

the quality of being sensitive to light; photosensitivity or photonasty

A sheet of light-sensitive material, such as specially treated plastic or glass, coated with a photographic emulsion and used for photography or duplication

Paper coated with light-sensitive emulsion used for making photographic prints or enlargements

a chemical substance that makes another substance sensitive to light; a photosensitizer

The core component of a laser printer, consisting of a drum-shaped base coated with photosensitive material; determines the overall print quality. Also referred to as a [[硒鼓|硒鼓|xi1 gu3]] in mainland China