thread vein
noun [ C usually plural ] UK uk/ˈθred ˌvəɪn/ us/ˈθred ˌvəɪn/ (also spider vein)
（腿部或面部透皮可见的）毛细血管
a very thin vein (= tube that carries blood) that can be seen on the legs or face
You can disguise thread veins and blemishes with a good concealer. 你可以用好的遮瑕膏来掩盖毛细血管和斑点。
Thread veins are fine capillaries just below the surface of the skin, usually around the thigh and calf area. 毛细血管是皮肤表面以下的细小血管，通常在大腿和小腿部位可以看到。
- More examples
- If you have thread veins, avoid facial steaming.
- Thread veins appear brown after treatment because remnants of blood may remain.
- At least half of all women and one in ten men will get unsightly thread veins at some time.