- A lesion regarding the epidermis, typically from the top percentage of your head, described as discolored, thickened or scaly growths of keratin, caused by contact with the sun's rays; typical in fair-complected individuals of a certain age. They have been precancerous.
- an overgrowth of epidermis layers caused by extended exposure to the sunlight
Hypernym for "actinic keratosis"
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