A magnet (especially a fridge magnet) that carries a photograph as decoration

A shade of blue that cannot be detected by graphic-arts camera film, thus useful in the design and print industry for writing notes on layouts to be photographed, or for laying down sketch lines.

having a reaction to, or able to be affected by, light

A device which photographically records the gamma rays passing through tissue that has been injected with a radioactive material.

(transitive) to make something photosensitive

The acquisition of photosensitivity / (chemistry) The transfer of a photon from one excited state to another, which then undergoes a reaction

sensitivity to light, especially a heightened response to light

plural of photoscanner

(physics) Obtained by photoselection

Any branch of physics, chemistry or biology concerned with the actions of light. / The science of photography.