a small brownish spot (of the pigment melanin) on the skin
例句
用作名词(n.)
Histologic examination of the tan patch reveals features of lentigo simplex, whereas the speckled macules and papules disclose melanocytic nevi.组织病理下褐色斑块呈现单纯性黑痣,而其上的斑点及丘疹则为黑色素细胞痣。