disapproval If you describe something such as a building, addition, or development as an excrescence, you strongly disapprove of it because you think it is unnecessary, bad, or ugly. an architectural excrescence The trade union block vote is an excrescence on democracy. = blot
An excrescent appendage, as, a wart or tumor; anything growing out unnaturally from anything else; a preternatural or morbid development; hence, a troublesome superfluity; an incumbrance; as, an excrescence on the body, or on a plant