Definify.com
Webster 1913 Edition
Actinism
Ac′tin-ism
,Noun.
[Gr. [GREEK], [GREEK] ray.]
The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.
Definition 2024
actinism
actinism
English
Noun
actinism (usually uncountable, plural actinisms)
- (chemistry, physics) That property of electromagnetic radiation that leads to the production of photochemical effects