protuberance

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

     n 1: something that bulges out or is protuberant or projects from
          a form [syn: bulge, bump, hump, gibbosity, gibbousness,
           jut, prominence, protrusion, extrusion, excrescence]
     2: the condition of being protuberant; the condition of bulging
        out; "the protuberance of his belly"