1. 鼓起的部分；隆起的部分
A protuberance is a rounded part that sticks out from the surface of something.

1. something that bulges out or is protuberant or projects from its surroundings

e.g. the gun in his pocket made an obvious bulge
the hump of a camel
he stood on the rocky prominence
the occipital protuberance was well developed
the bony excrescence between its horns

Synonym: bulgebumphumpswellinggibbositygibbousnessjutprominenceprotrusionextrusionexcrescence

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

e.g. the protuberance of his belly