An obsolete term for adverse reaction of skin to radiation therapy (ultraviolet, X-ray, or radium); more commonly, radiodermatitis. ... Synonym: photodermatitis. ... Origin: actino-+ G. Derma, skin, + -itis, inflammation ... (05 Mar 2000) ... 
(ak″tĭ-no-dur″mә-ti´tis) cutaneous inflammation due to excessive exposure to sunlight or to exposure to x-rays.
actinodermatitis Inflammation of the skin as a result of exposure to sunlight or because of adverse reaction to radiation-skin therapy.
inflammation of the skin caused by sunlight or other radiation.