noun
solar lentigo; sun spot; liver spot
Medical term for a benign pigmented spot on sun-exposed skin, commonly called a liver spot or age spot. Also referred to as 老人性色素斑.
See also: 老人性色素斑
日光性黒子は紫外線の影響でできるシミの一種です。
Solar lentigo is a type of spot caused by UV exposure.
Synonym; 日光性黒子 is the more clinical term, while 老人性色素斑 is also common in medical contexts.
Compound of 日光 (sunlight) + 性 (-ic, -like) + 黒子 (dark spot, mole). The exact derivation is uncertain; the term is a modern medical coinage.