n.
Pronunciation: ' ə l-s ə r
Function: noun
Etymology: Middle English, from Latin ulcer-, ulcus; akin to Greek helkos wound
Date: 14th century
1 : a break in skin or mucous membrane with loss of surface tissue, disintegration and necrosis of epithelial tissue, and often pus
2 : something that festers and corrupts like an open sore
– ulcer verb