Meaning

noun a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue

noun the process of ulcer formation; the process of becoming ulcerated

originEtymology tree English ulcer Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English ulceration From ulcer + -ation.

Etymology from Wiktionary, CC BY-SA 3.0