(n.) The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). actinism. Retrieved September 24, 2026, from http://smartdefine.org/actinism/definitions/1970667 |
| Chicago | Webster's. 2011. "actinism" http://smartdefine.org/actinism/definitions/1970667 (accessed September 24, 2026). |
| Harvard | Webster's 2011, actinism, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/actinism/definitions/1970667>. |
| MLA | Webster's. "actinism" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/actinism/definitions/1970667> |