Source : Webster's Revised Unabridged Dictionary (1913)

Denticulate \Den*tic"u*late\, Denticulated \Den*tic"u*la`ted\,
   a. [L. denticulatus, fr. denticulus. See {Denticle}.]
   Furnished with denticles; notched into little toothlike
   projections; as, a denticulate leaf of calyx. --
   {Den*tic"u*late*ly}, adv.

Source : WordNet®

denticulate
     adj : having a very finely toothed margin