protuberance

英 [prə'tjuːb(ə)r(ə)ns] 美[pro'tubərəns]

• n. 突起，突出；结节，瘤

1. something that bulges out or is protuberant or projects from a form

2. the condition of being protuberant; the condition of bulging out;

"the protuberance of his belly"