Main Entry: ex·cres·cence

Pronunciation: \ik-ˈskre-s^ən(t)s, ek-\

Function: noun

Date: 15th century

1 : a projection or outgrowth especially when abnormal <warty excrescences in the colon>
2 : a disfiguring, extraneous, or unwanted mark or part : blot
3 : by-product 2