fragment

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

     n 1: a piece broken off of something else; "a fragment of rock"
     2: a broken piece of a brittle artifact [syn: shard, sherd]
     3: an incomplete piece; "fragments of a play"
     v : break or cause to break into pieces; "The plate fragmented";
         "I don't want to break up the group" [syn: break up, fragmentize,
          fragmentise]