Dictionary:

modillion

  (mō-dĭl'yən)

An ornamental bracket used in series under a cornice, especially a cornice of the Corinthian, Composite, or Ionic orders.

[Italian modiglione, from Vulgar Latin *mutiliō, mutiliōn-, from Latin mūtulus, perhaps of Etruscan origin.]

A horizontal bracket or console, usually in the form of a scroll with acanthus, supporting the corona under a cornice. If in the form of a plain block, it is a block modillion or uncut modillion. Found in Corinthian, Composite, and, less frequently, Roman Ionic orders.

The noun has one meaning:

Meaning #1: (architecture) one of a set of ornamental brackets under a cornice