The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
denticulate adj 1: having a very finely toothed margin