actinic ray actinic radiation • actinide · · · Info · Definitions · Synonyms · Characters · · actinic ray · · Text Common · · Latin · · Scripts 11 · · Length 4 · · Syllables Definitions · · · (noun) electromagnetic radiation that can produce photochemical reactions. Synonyms: actinic radiation, actinic ray. · · Noun Definition 1 Synonyms · · · actinic radiation · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079