Main Entry: ul·cer

Pronunciation: \ˈəl-sər\

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