hem·or·rhoid 
(hĕmə-roid′)
(hĕmə-roid′)n.
1. An itching or painful mass of dilated veins in swollen anal tissue.
2. hemorrhoids The pathological condition in which such painful masses occur. Also called piles.
[From Middle English emoroides, hemorrhoids, from Old French emoroides, from Latin haemorrhoidae, from Greek haimorrhoïdes, pl. of haimorrhoïs, from haimorrhoos, flowing with blood : haimo-, hemo- + rhein, to flow; see sreu- in the Appendix of Indo-European roots.]