Pronunciation: (ul'su-rāt"), [key]
—v., -at•ed, -at•ing.
to form an ulcer; become ulcerous: His skin ulcerated after exposure to radioactive material.
to cause an ulcer on or in: Continued worry ulcerated his stomach.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.