actinic keratosis actinic dermatitis • actinic radiation · · · Info · Definitions · Characters · · actinic keratosis · · Text Common · · Latin · · Scripts 17 · · Length 7 · · Syllables Definitions · · · (noun) an overgrowth of skin layers resulting from extended exposure to the sun. Synonyms: actinic keratosis. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074