Hemorrhoidectomy

n. surgical removal of hemorrhoids (abnormally enlarged veins in or near the anus)

Hemorrhoids (AmE), haemorrhoids (BrE), emerods, or piles are varicosities or swelling and inflammation of veins in the rectum and anus.
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Noun
1. surgical procedure for tying hemorrhoids and excising them
(synonym) haemorrhoidectomy
(hypernym) operation, surgery, surgical operation, surgical procedure, surgical process