Definify.com
Webster 1913 Edition
Coak
Coak
,Noun.
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
,Verb.
T.
(Carp.)
To unite, as timbers, by means of tenons or dowels in the edges or faces.
Totten.