1. The diseased tree is marked by protuberance on their bark. 有病的树木可由其树皮上的结节看出。
2. A small protuberance or elevation, as from an organ, a tissue, or a structure. 隆起物，凸出物（器官，组织或结构上的）小隆起或凸出物。
3. A circular protuberance or knob like swelling, as on the horns of certain animals. 瘤，''。'节疤'。''凸饰环状突出或节状肿起，如在一些动物角上的突起。
英英解释
n.
1. something that bulges out or is protuberant or projects from its surroundings
2. the condition of being protuberant; the condition of bulging out
