birthmark
UK
birthmark n: (congenital skin blemish)
SC 胎记 tāi jì
SC 胎痣 tāi jì，tāi zhì
Nicole's birthmark covers most of her left cheek.
birth mark n: (patch of dark, red skin)
SC 胎记 tāi jì
She is really self-conscious about the birth mark on her neck.