ulcer Noun, n, ulcer ulcer Appox. usage (any sense): 2.57 per million words Appox. usage (any sense): 2.57 per million words
ulcus Noun, n, ulcus sore, ulcer, wound Appox. usage (any sense): less than 0.1 per million words Appox. usage (any sense): less than 0.1 per million words