英语释义
1. an abnormal mass of dilated and engorged blood vessels in swollen tissue that occurs internally in the anal canal or externally around the anus, that may be marked by bleeding, pain, or itching, and that when occurring internally often protrude through the outer sphincter of the anus and when occurring externally may lead to thrombosis —usually used in plural — called also piles
2. a swollen and painful area located at or near the anus
3. an abnormal mass of dilated and engorged blood vessels in swollen tissue that occurs internally in the anal canal or externally around the anus, that may be marked by bleeding, pain, or itching, and that when occurring internally often protrude through the external anal sphincter and when occurring externally may lead to thrombosis —usually used in plural — called also piles