Warts and pimples are common excrescences that can usually be wiped out with medication; other excrescences such as cysts and tumors need to be removed surgically. Mushrooms are the excrescences of underground fungus networks. Some people consider slang words to be vulgar excrescences on the English language, but others consider slang the most colorful vocabulary of all.
Examples of excrescence in a Sentence
concerned about the weird excrescence that seemed to be developing on his hand
local residents regard the hulking apartment building as a hideous excrescence on their once-lovely street