The Collaborative International Dictionary of English v.0.48:

Mutule \Mu"tule\, n. [F., fr. L. mutulus.] (Arch.)
   A projecting block worked under the corona of the Doric
   corice, in the same situation as the modillion of the
   Corinthian and Composite orders. See Illust. of Gutta.
   --Oxf. Gloss.
   [1913 Webster]