extrusion in WordNet English dictionary

1. 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"
   bulge  bump  hump  swelling  gibbosity  gibbousness  jut  prominence  protuberance  protrusion  extrusion  excrescence 
   
2. squeezing out by applying pressure
   "an unexpected extrusion of toothpaste from the bottom of the tube"; "the expulsion of pus from the pimple"
   extrusion  expulsion