excrescence

详细解释:n. 瘤, 赘生物, 自然长出物(如指甲、头发)
【医】 赘生物, 赘疣

英语解释：

名词 excrescence:

something that bulges out or is protuberant or projects from its surroundings同义词：bulge, bump, hump, gibbosity, gibbousness, jut, prominence, protuberance, protrusion, extrusion