actinic keratosis

== English == === Noun === actinic keratosis (plural actinic keratoses) (medicine, pathology, dermatology) A potentially precancerous skin lesion, typically on the upper portion of the head, characterized by discolored, thickened or scaly growths of keratin and caused by repeated exposure to ultraviolet light, such as from sunlight or tanning beds. ==== Synonyms ==== (skin lesion characterized by discolored, thickened growths of keratin): solar keratosis, senile keratosis ==== Translations ====