Examples from the Web for actinism
The third constituent of the sunbeam is actinism—its property being to produce chemical effects.
Experiments clearly prove that this change is to be attributed to actinism, and not to heat.
An instrument for registering the intensity of the chemical influence (actinism) of the suns rays.
As yet, the effects of actinism have been more studied in the inanimate than the organic creation.
Actinism, ak′tin-izm, n. the chemical force of the sun's rays, as distinct from light and heat.