extrusion

extrusion (http://definr.com/extrusion)

     n 1: something that bulges out or is protuberant or projects from
          a form [syn: bulge, bump, hump, gibbosity, gibbousness,
           jut, prominence, protuberance, protrusion, excrescence]
     2: squeezing out by applying pressure [syn: expulsion]