N-COUNT
多余物;累贅
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.
例句
...an architectural excrescence...
多余的建筑物
The trade union block vote is an excrescence on democracy.
工會集團投票制是民主的毒瘤。