something that bulges out or is protuberant or projects from its surroundings;
\\\"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\\\"
the act of projecting out from something
造句
用作名詞(n.)
Thumb-sucking can cause protrusion of the teeth. 經常吮吸拇指能使牙齒向外突出。