The Collaborative International Dictionary of English v.0.48:

Ectocuneriform \Ec`to*cu*ne"ri*form\, Ectocuniform
\Ec`to*cu"ni*form\, n. [Ecto- + cuneiform, cuniform.] (Anat.)
   One of the bones of the tarsus. See Cuneiform.
   [1913 Webster]