from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun medicine A lesion on the skin, typically on the upper portion of the head, characterized by discolored, thickened or scaly growths of
keratin, caused by exposure to the sun; common in fair-complected people of a certain age. They are precancerous.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an overgrowth of skin layers resulting from extended exposure to the sun
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