ACTINISM
Source: 567
Ac″tin‐ism (�), n. [] The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.
Source: 567
Ac″tin‐ism (�), n. [] The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.