— ulceration , n.
/ul"seuh rayt'/ , v. , ulcerated, ulcerating .
v.i.
1. to form an ulcer; become ulcerous: His skin ulcerated after exposure to radioactive material.
v.t.
2. to cause an ulcer on or in: Continued worry ulcerated his stomach.
[ 1375-1425; late ME ulceratus (ptp. of ulcerare to make sore), equiv. to ulcer- (see ULCER) + -atus -ATE 1 ]