Bible Dictionaries
Actinism

Webster's Dictionary

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

Bibliography Information
Webster, Noah. Entry for 'Actinism'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​a/actinism.html. 1828.