(一般作 haemorrhoids)a swollen vein or group of veins in the region of the anus. Also (collectively) called piles 痔。 (亦(总)称 piles
派生 haemorrhoidal adjective 语源
late Middle English: via Old French and Latin from Greek haimorrhoides (phlebes) 'bleeding (veins'), from haima 'blood' + an element related to rhein 'to flow'