Source : Webster's Revised Unabridged Dictionary (1913)

Modillion \Mo*dil"lion\, n. [F. modillon, It. modiglione. Cf.
   {Module}, n.] (Arch.)
   The enriched block or horizontal bracket generally found
   under the cornice of the Corinthian and Composite
   entablature, and sometimes, less ornamented, in the Ionic and
   other orders; -- so called because of its arrangement at
   regulated distances.

Source : WordNet®

modillion
     n : (architecture) one of a set of ornamental brackets under a
         cornice