DENTICULATE is a 11 letter word that starts with D.
\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.
WordNet Dictionary