erose

from WordNet (r) 3.0 (2006)

erose
    adj 1: having an irregularly notched or toothed margin as though
           gnawed [syn: {erose}, {jagged}, {jaggy}, {notched},
           {toothed}]

from The Collaborative International Dictionary of English v.0.48

Erose \E*rose"\, a. [L. erosus, p. p. See {Erode}.]
   1. Irregular or uneven as if eaten or worn away.
      [1913 Webster]

   2. (Bot.) Jagged or irregularly toothed, as if nibbled out or
      gnawed. -- {E*rose"ly}, adv.
      [1913 Webster]