[See ACTINO-.] The chemistry of actinism; that branch of chemistry, which treats of the chemical energies existing in the solar rays.
1844. Sir J. Herschel, Brit. Assoc. Report, 12. A contribution to the newly created science of actino-chemistry.
1853. R. Hunt, Man. Photog., 116. Proceeding only to the more delicate processes when he has mastered the rudimentary details of the more simple forms of actino-chemistry.
1875. Ure, Dict. Arts, I. 28. Actino-chemistry was a term first applied by Sir John Herschel, and has been generally adopted.
