The Collaborative International Dictionary of English v.0.48:

Dentate \Den"tate\ (d[e^]n"t[asl]t), Dentated \Den"ta*ted\
   (d[e^]n"t[asl]*t[e^]d), a. [L. dentatus, fr. dens, dentis,
   tooth.]
   1. (Bot.) Toothed; especially, with the teeth projecting
      straight out, not pointed either forward or backward; as,
      a dentate leaf.
      [1913 Webster]

   2. (Zool.) Having teeth or toothlike points. See Illust. of
      Antenn[ae].
      [1913 Webster]

WordNet (r) 3.0 (2006):

dentate
    adj 1: having toothlike projections in the margin

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "dentate":
   battlemented, chopped, clawed, crenate, crenated, crenellated,
   crenulate, dentated, digital, digitate, digitated, embrasured,
   erose, fanged, fingered, gashed, incised, indented, jagged, jaggy,
   jawed, lacerate, lacerated, nicked, notched, prehensile, raptorial,
   saw-toothed, sawlike, scalloped, scored, serrate, serrated,
   serrulated, taloned, toothed