1. 挤压；挤出
Extrusion is the act or process of extruding something.

1. squeezing out by applying pressure

e.g. an unexpected extrusion of toothpaste from the bottom of the tube
the expulsion of pus from the pimple

Synonym: expulsion

2. 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: bulgebumphumpswellinggibbositygibbousnessjutprominenceprotuberanceprotrusionexcrescence