PHOTOCHEMISTRY

photochemistry

(noun) branch of chemistry that deals with the chemical action of light

Source: WordNet® 3.1

Etymology

Noun

photochemistry (usually uncountable, plural photochemistries)

(chemistry) The study of photochemical reactions.

Source: Wiktionary

Pho`to*chem"is*try, n. Etym: [Photo- + chemistry.] (Chem.)

Definition: The branch of chemistry which relates to the effect of light in producing chemical changes, as in photography.

Source: Webster’s Unabridged Dictionary 1913 Edition