Actinism

[æktinizm]

(noun.) the property of radiation that enables it to produce photochemical effects.

Checker: Polly--From WordNet

(n.) The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.

Inputed by Bruno

n. the chemical force of the sun's rays as distinct from light and heat.—adj. Ac′tinic.

Typist: Moira