\Coak\ (k[=o]k), n.
See {Coke}, n.

\Coak\, n.
1. (Carp.) A kind of tenon connecting the face of a scarfed
   timber with the face of another timber, or a dowel or pin
   of hard wood or iron uniting timbers. [Also spelt {coag}.]
2. A metallic bushing or strengthening piece in the center of
   a wooden block sheave.

\Coak\, v. t. (Carp.)
To unite, as timbers, by means of tenons or dowels in the
edges or faces. --Totten.